I agree with quite a few of the above mentioned, but my favorites in terms of intimidation have to be:
(In no particular order)
- Chuck Liddell (Like someone above said...just because of what he's capable of doing.)
- Babalu (Like moldy said...Sobral always has the messed up hair, stares down the aisle with a crazy-ass look, and the tatts really give him a presence.)
- Sean Sherk (I like the JAWS intro - and he's always focused.)
- Andrei Arlovski (Just because he looks like a beast when he comes out...plus the "Onward To Victory" theme he has kicks major ass.

)