my rankings for play-by play guys...
Football: dick enberg, mike tirico, al michaels (he is easily the sharpest though), gus johnson, ian eagle (ya ya...maybe its cuz he's done so many bills games lately, but he's grown on me)
Hockey: bob cole (piss on anyone who hates him), mike emrick, pre-2000 joe bowen (before he became a caricature of himself)
the all-time best have to be the soccer announcers during the world cup though...
i could go on, but no other sport really matters enough now, does it??