Top 4 Chess Openings

1 White

a. Evans Gambit 

If you are an attacking player, then this opening is essential, most times you can have a ferocious attack. This opening works at 1700 level. To make things better, chess.com just made a course on the Evans Gambit. It is essential for attacking players. If your opponent doesn’t play this, you can still try the sharper lines - attack. (Richter Rauzer Attack v. Sicilian) Classical French, or Classical Caro - Kann.

b. Queen’s Gambit

If you are a positional player, then the Queen’s Gambit is probably best. Chess.com has a course on this opening too. It requires a keen positional sense. If your opponent play the Indian Defense, I would play c4 and get the King’s or Nimzo Indian Defence. In the King’s Indian the expansion on the queen side is especially important, in the Nimzo however you have to keep the position open to favor the two bishops that your are very likely to have.

c. 
If your opponents don’t play these lines, I recommend Richter Rauzer because you get a demolishing kingside attack, against the Sicilian, Classical Caro-Kann, and Burn French. These are all time tested main lines.

2. Black

a. Against King’s Pawn - Sicilian

I would recommend Sicilian against King’s Pawn because you can capitalize on your opponents mistakes. Black’s position is like a spring - very flexible. I would choose the d6 Sicilian because white doesn’t have many options other than d4. I would recommend transposing into a Classical Sicilian with cxd4 followed by Nf6 by Nc6. No one will play Bg5 or Bc4 against you. But I would not recommend this if you are rated less than 1500 rapid. If you are less than 1500 you should play the French 1.e6 or the Caro - Kann 1.c6.

b. Against Queen’s Pawn - King’s Indian or Nimzo Indian or Slav

I would recommend Nimzo Indian if you are more than 1600 rated rapid because it requires a very strong positional understanding and a tactical understanding. If you are lower rated than that, then I would recommend the King’s Indian Defense because it is largely reliant on a Kingside attack. If you are positional then the Slav is very good if you are past 1500 rapid. This is because after this level opponents will most regularly play 2.c4 after Nf6.

c. Against English and Reti

If you are facing the English or Reti, then you are at least 1700 rapid because only very positional opponents will play this against you. My English strategy is to try and play d5 with the Reversed Sicilian, if you are 1400 then play 1.c5 because it is symmetrical and less complicated. I would recommend a queen’s fianchetto against the Reti because I have won an especially good game in that line.

Let's wait until frank0987654321frank gives us his opinion before we disagree to agree on the matter.

evan's gambit kinda bad

also, catalan should be on the list

Better, what would you say.

The fishing pole?

London System can be useful for playing for a draw

Interesting recommendations  @frank1234567890frank. I agree that the Richter-Rauzer and Nimzo-Indian are the best. I independently came to the same conclusion myself.