Jermaline (MM2) makes a nice race for both ability contests and hide contests:
Ability: Venerable jermaline -> +9 racial to Wis. Add Precocious Apprentice (Owl's wisdom) for a max 31 wis at first level
Hide:
Beguiler 1, Dex 24 (26 w/ compression), Int 15, cha 5, rest min
Feat: Precocious Apprentice (invisibility)
Skills: maxed hide, maxed UMD, maxed UPD
Items: Scroll (Camouflage) 25 po, Psionic stone (compression) 25 po, Masterwork skill tool
Result: 76 -> +12 size (diminutive), +8 Dex, +10 circumstance (camouflage), +40 untiped (invisibility), +2 MW tool, +4 ranks. 96 when taking 20
Without external help.
EDIT: It could just replace Whisper Gnome as the race for Skydragon Erudite build for a +2 to hide and independence from UMD/UPD.