Oh yeah Bas Rutten, let's not forget him. He's definitely my favorite from the old school days.
I'm not sure why people like Dan Severn so much. Anyone who had success in the early UFC days have a cult following that is seemingly never going to die. Royce Gracie is proof of this big time with UFC 60 coming up, it's actually pretty divided as to who people think will win - even the die-hard fans of the sport who you would think would know better.