Most annoying analyst: Tim McCarver. (That cbb idiot is in a class of his own.)
Football. Best play-by-play: Al Michaels. Best analyst: Phil Simms.
Best basketball play-by-play: Marv Albert. Best analyst: Kara Lawson.
Going back a few years, Red Barber was a special baseball announcer and I miss the uniqueness of Johnny Most (Celtics) and Dizzy Dean (weekly baseball on BW TV, sharing the mike with PeeWee Reese).
As a native Pittsburgher, I recall the characters who did baseball (Rosey Rosewell and Bob Prince) and "Stiller" football (Myron Cope, creator of the Terrible Towel).