Najdorf vs Accelerated Dragon

The Najdorf is objectively better, but also has more theory.
The accelerated dragon 3...g6 and the hyperaccelerated dragon 2...g6 are objectively less sound, but have less theory.

Accelerated dragon will fit you perfectly.

I used to play the Dragon many years ago, but gave it up in favor of the Najdorf. Not because of tactics or the h-file attack... it was because of the weakness of the d5 square. In the Najdorf you can just play e7-e6.

@4

The main point of the Najdorf is to play ...e5, not ...e6.

The main point of the Accelerated Dragon is to be able to play ...d5 in one move, while in the regular Dragon black plays ...d6.

It's obvious you're not a Najdorf player.

6. ... e5 is playable (but not necessarily best) against 6. Be2 or Be3.

It isn't playable against 6, Bg5 or Bc4. Against those moves 6. ... e6 is much superior to 6. ... e5.

@6

The main line is nowadays 6 Be3 e5. 6...e6 is a bad Scheveningen and runs into the Keres Attack 7 g4.
6 Be2 e5 was the main line in the days of Karpov. Also there 6...e6 is a bad Scheveningen.
Of course after 6 Bc4 e6.
The old main line 6 Bg5 was intended to stop 6...e5.
Likewise Fischer's 6 h3 was specifically directed against the characteristic 6...e5.

As ususal. you grossly oversimplify. Caruana played 6. Bg5 twice in the recent Candidates. Carlsen played it at Tata Steel and at the London Classic... both against top-ten opposition.

6. Bc4 is a favorite of Aronian (again, one of the best in the world). And the 6. Be3 e6 line was a favorite of Kasparov and is still played today by Giri and Nakamura among others.

One point that you don't seem to take into account is that World Class Players are every bit as fashion-conscious as teenage girls. They often switch opening lines simply because a new line has become topical, not because the old line is bad. When Kasparov brought back the Scotch Game after a hundred years of neglect, it wasn't because he had discovered some amazing new line in that opening... he just started playing a system that had gone out of fashion a hundred years before.

In fact, 6. ... e6 has a slightly HIGHER winning percentage for Black than 6. ... e5 has. It just also has a higher losing percentage. In other words, 6. ... e5 is less risky while 6. ... e6 is more ambitious.

You can't just learn one opening in the Sicilian. Before you get to a Najdorf there is Smith Mora gambit, c3 Sicilian, Closed Sicilian. Also the different dragons have different theory as the development speed has different priority requirements on the development of both sides. Better to learn the ideas behind each move in the Sicilian and how they interact with everything in the set ups. Important thing to know is that white tends to attack on the king side and black on the queenside. This is not exclusive and white can castle either side with little difficulty so the impact on such attacks may be more decisive on a castled position. Najdorff particularly has races on both sides of the board attacking castled positions. Sicilian is very double edged and black does have many holes in their set up that must be played around that you need to be aware of. It is prone to weaknesses on the light square diagonal on a4-e8, there is often a backwards pawn on d6 in the Najdorff which means d5 is an outpost and even if badly played could be occupied by an advanced pawn with e6 or c6 as minor piece outposts. The dark squared bishop is often bad and stuck between knights on f6 and d6 where white trys to pin f6 or take it. Castling should be delayed until progress is made on the queen side as an early castle often leads to an overwhealming attack by white who controls rapid bishop and queen maneauvers between both sides of the board.