Is it for 3.5 or 4E? If 4E: Open your PHB.

For 3.5, on the top off my head, I'd say: Sun Elves (+2 INT, -2 CON), Grey Elves (+2 INT, +2 DEX, -2 STR, -2 CON), Lesser Tieflings (+2 DEX, +2 INT, -2 CHA) and Fire Elves (+2 INT, +2 DEX, -2 CON, -2 CHA).
Maybe you can buy-off Level adjustment? Then you have a broader choice.