Best or favorite front man...

[BengalsRocker]

C'mon man...  Ronnie James Dio for metal.

Great voice.  Worked the crowd and did all of theatrics.

Ozzy would be another mention of someone who may not be the greatest singer but went "all in" on theatrics.

David Lee Roth was the epitome of a rock front-man but yes he is a sad shell of his former self. 

DLR was not a good vocalist live even at his peak.