It has to be Gary Fisher. He invented the mountain bike, you know!
[/sarcasm]
Seriously though, quite a few good candidates so far. Here are a few more that haven't already been named who I wouldn't mind/haven't minded spending time with:
Bob Roll
Myles Rockwell
Gary Fisher
Sheldon Brown
Cedric Gracia
Floyd Landis
George Hincapie
Hans Rey
Greg Herbold
Keith Bontrager
and of course the many fine people who I buy stuff from as well.
That having been said, at bike shows I can't help but be drawn to a certain booth where they sell helmets to speak with a certain person from Warminster, England. It has nothing to do with any man, I'll tell you that much...