Chinny, thanks for the Foster shout out, he's my man. But to the TS, please never mention Valuev and Arguello in the same sentence, goddammit.
Anyone want to throw Panama Al Brown in there? And while Williams and Caballero are tall fighters, neither one really fights 'tall' in the sense discussed in the original post.
vernon forrest was around 6 feet at welter and at his best used height an legth very effectivly prior to shoulder problems used very effective jab
No ones mentioned Ali yet? Not super tall for a HW (I've heard from 6'3'' to 6'5'') but used height well and fought tall. Anyone who's seen him lean backwards to slip a jab and then lean back into a right hand can attest to that.
Valuev. just kidding valuev sucks ass. lennox Lewis would be my pick. he uses that reach and size just right.