Chess and complicated positions

Alekhine, Tal, Shirov, Kasparov, Topalov, Jobava, Morozevich, Mamedyarov, Nezhmetdinov, Rapport come to mind.

In other words when the position is a big mess, and everything is hanging or being attacked, who would you expect to come out on top regardless of what the objective evaluation is?

That's what he means "emerge as winners."

A famous quote from Tal: "You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one."

I'm open to considering other people's bias anytime, just comment below 

@stiggling You named them all. Among them, my favorite is Tal. Only engines can refute Tals sacrifices.

Here's a complicated position. In this position obvious move is Qxa4. Even Stockfish agrees with it. But according to Lomonosov tavblebases only move that is winning is Qa3. Every other move draws or loses. Even Qxa4 draws. I can't understand it. Can anyone help me out with this one?

Well I got it. If queen takes pawn, then Rf8 is a fortress. If white plays any move other than Qa3, black just plays Rf8 and it's a fortress. Only move which prevents Rf8 is Qa3! Interestingly enough, even stockfish doesn't get it.