Walken and Goldblum are enjoyable in nearly everything they do, but Michael Keaton IS Batman, for god's sake. There's simply no comparing the three. One is still more or less leading man material, the others... more character/straight to video sort of actors.
Speaking of "eccentric vs crazy" and also speaking of Goldblum, I had no idea this show existed until recently, looks fun
Forgot to mention Dopesick for Keaton. Have only watched a few episodes. Not super high on the series so far but his scenes are top notch.
Night Shift -> Mr. Mom -> Johnny Dangerously is 3 solid comedy movies in a row. I'd add The Burbs, but that was Tom Hanks yet it might have been better with Michael Keaton. Also, range-wise as an actor, he did Beetlejuice and Clean and Sober in the same year (then he was Batman the next year)
I can't answer the OP's question so I am abstaining from the poll, respectfully. Walken was a trained dancer who worked as a circus lion-tamer as a teenager, Goldblum was a magician and now a jazz musician, and Keaton's first job was on Mr. Rogers' Neighborhood. ...so I'm sticking with my write-in of Malkovich.