I don't play the Sicilian but even if I play it then I think Najdorf is better than the Dragon as the great Bobby Fischer used to say that if someone plays the Sicilian Dragon, then he is going to get crushed by white.
Sicilian Defense - which is the best??

Yes

Erm..... Any suggestion???? which sicilian defense is probably the most reliable???? I have two options - Sicilian Najdorf and Sicilian Dragon.... but i dont know which one is better, I'm an aggresive player, so sicilian dragon probably the best for me, but Garry Kasparov is also an aggresive player, but he choses Sicilian Najdorf.....I wonder why.....is sicilian dragon not reliable??
so...... Sicilian najdorf or sicilian dragon??
Actually, the Maroczy Bind with 5.c4 against the Kan is a critical line (as advocated by Kotronias and Semkov in Attacking the Flexible Sicilian). If Black plays a Hedgehog setup he gets crushed, for example:

Actually, the Maroczy Bind with 5.c4 against the Kan is a critical line (as advocated by Kotronias and Semkov in Attacking the Flexible Sicilian). If Black plays a Hedgehog setup he gets crushed, for example:
Shaw and Ntirlis advocate 5.c4 as well against the Kan in their QC repertoire book.

Erm..... Any suggestion???? which sicilian defense is probably the most reliable???? I have two options - Sicilian Najdorf and Sicilian Dragon.... but i dont know which one is better, I'm an aggresive player, so sicilian dragon probably the best for me, but Garry Kasparov is also an aggresive player, but he choses Sicilian Najdorf.....I wonder why.....is sicilian dragon not reliable??
so...... Sicilian najdorf or sicilian dragon??
Actually, the Maroczy Bind with 5.c4 against the Kan is a critical line (as advocated by Kotronias and Semkov in Attacking the Flexible Sicilian). If Black plays a Hedgehog setup he gets crushed, for example:
Sir, Maroczy is a good option.
But I havent seen a forced win from white to Sicilian in TCEC where top computer calculates billions of moves in every position.
In your line, Stockfish wont defend like a punching bag!
SF will fight back with d5, when you play b4.

In earlier moves, Nc6 is the better option than d6. In fact ,you play like totally cramp position for about 12 moves and claiming better is not logically sound.

Please read my comment properly. I said that if Black goes for a standard Hedgehog setup, he gets into a lot of trouble, not that the entire Kan was completely busted. Strangely enough, both games I have played in the line OTB have reached the position after move 15. In the first game (against an IM) I forgot about 16.g5! and played the meek 16.Bf3? and later lost, and then got the same position a couple of months later against an FM and won in 24 moves. So even titled players are unaware of the dangers of this line.
As for your suggestions, 9...Nc6 is a good try at this juncture (but a move very much not in the spirit of the Kan), with 10.Nxc6 dxc6 11.f4 Bc5+ 12.Kh1 Nd7 being the line given. The b7-Bishop looks a bit funny, and I would probably prefer White, but it's just an interesting position.
11...d5!? is obviously critical, but the following line seems to give White the advantage (also from Kotronias & Semkov):

According to Stockfish and Leela , they chose Najdorf, not Kan. But my theory in chess is like, " as there is big margin of error in chess that even if you play one or two sub optimal moves or you lose one pawn in a game ,you may be able to get a draw if you play precisely for the remaining moves.
Kan variation may still lead to draw but may be more difficult to draw than Najdorf.( according to Lc0 statistics in 60 millions games during training)
Strangely and funny enough, latest Leela net T40 chose Ruylopez ( Berlin, a known notorious drawish line among human ) as black. Not Sicilian.
"Generally speaking, 'Starting Out' and 'Sicilian Najdorf' are not exactly words that one envisions in the same title, because anyone who is just starting out should not dive into the vast ocean of theory that is the Najdorf. For beginners, the time invested in studying even minor lines can be more productively used solving tactical puzzles and basic endgame technique.
...
... In some lines, a good understanding of basic principles will take you far, while in others, such as the Poisoned Pawn (6 Bg5 e6 7 f4 Qb6!?), memorization is a must, as one wrong move can cost you the game in the blink of an eye. ..." - FM Carsten Hansen (2006)
https://web.archive.org/web/20140626175558/http://www.chesscafe.com/text/hansen87.pdf
I believe Chess Explained said that the Taimanov for black is the best if you don't want to learn a bunch of theory, and it's got some good tricks if your opponent plays an open sicilian and doesn't place his pieces correctly, which he/she most likely won't unless they know what they're doing, because the piece placement for white in this line needs to be different than other sicilian line, especially with the Bishops. Black can often pin the white knight on c3 and then pile up on it especially after a timly d5 pawn push. I'm no expert, but I think what Chess Explained said who is an expert is 100% accurate. I would think that anyone who is under 1800 should stick with this, although if you really want to study a ton of theory the Nijorde can work well. But who wants to study that much. I think a person is better off spending that time on tactics, which I'm too lazy to do even that. The other thing about the sicilian is those who play it are prepared for the open lines, and at lower levels white tends to avoid those and you end up out of book pretty quick. For example, when black plays the Taimonov, it's easy for black and hard for white in in the open line, but I'm pretty such White can simply turn it into a French Structure in which case black could be out of his confort zone.