I published an blog article on Tony Santasiere, in case anyone might be interested.

Tal was like a war general who -to his enemy's horror- brutally decapitated the head of his own trusted liutenant before charging forward. Fighting against an experienced general is one thing. Fighting against a mad man is another thing. Tal was a mad man.

Tal changed his style around 1972.  He became a safer player as evidenced by the undefeated streaks mentioned by Estragon.  Of course he was still capable of fantastic sacrifices, but older Tal was different from younger Tal.

The very same is true for forever second Paul Keres. His young games contain full of energy and attacking style. Older Keres was just the opposite.

It seems that hypothesis is correct at first look. But where will we put David Bronstein, Efim Geller and few others?

You guys seemed to have forgotten about Charousek and Stein.

The Romantic Chess Variant is normal chess except that pawns must promote to knights. This is meant to discourage playing for a better endgame as a winning strategy, effectively promoting direct mating attacks as the only realistic way to win the game.

You can play this chess variant against an engine at https://www.apronus.com/chess/romantic-chess-variant.htm but more importantly we should start playing this chess variant among ourselves! Any chess playing interface will do as long as we agree to promote pawns to knights only.