Mickey Mantle - traded up to get him at the #5 spot in a 51/91 dual progressive initial draft (Bonds, Clemens, Maddux, and Mays went before him.) Mantle's been MVP for 5 straight seasons (56-60) and is well on his way to a 6th straight. Meanwhile, the club one two World Series in the decade and a couple more pennants. So I picked up The Mick in another progressive (via trade) just for his '63-on seasons.
I've had Billy Pierce twice too. Never spectacular, but solid - often one of the top ten starters in the league, if never the best.