Hello there, so you want to know what's the best Spider-Man figure. Ok, being honest I can only speak for myself, and I've been collecting Marvel Legends since April 2020, so probably I'm not the ultimate source of truth about Marvel Legends, but what I can do tell you, is what's the best Marvel Legends Spider-Man figure, at least for me.
And that figure is:
The Retro Spider-Man figure. Released on 2020 with double abs crunch and the Steve Ditko classic look.
IMO this is truly the Ultimate Marvel Legends Spider-Man figure.