I'd say best was Serra...especially when he was cornering guys, like seriously there is no way that you are not hearing that guys instructions!!! "Haaaaaammerfist ELBOOOOOOOOOW!!!!"
"All day, you can do this all day!!!" etc.
Worst:...well I hate to beat on a dead horse...but one more time let's hear it for the worlds most dangerous can KEN SHAMROCK!!!