Aasimar.
Aasimar get two +2 bonuses to stats without any negatives. Various sub races make it pretty easy to customize to a specific class. With alternate race features you can even get a +4 and a +2, or a third +2 Stat, with DM approval. Aasimar can also be Small, picking up a +1 AC and +1 to hit. They gain wings and can fly for a feat after level 10. Some of the best racial SLAs in the game, and a feat that can bonus the base version spell Daylight to gain Sunbeam (7th level Druid Spell) as a SLA at 9th level.
Still want to be human? Just take the Scion of Humanity alternate race trait and you count as human.