In no particular order....
Wyeast
1272 - So versatile as a house yeast
2112 - Cant go past this for a Cali common - up there for my favourite beer
1469 - Another lover of this yeast, really is a star performer, can be fermented at 16 - 17 with large pitch for lower ester development, let rise to 19 -20 after a few days to finish off and of course goes off like a rocket 18 - 22 and produces a flavoursome English bitter.
1098 - Another versatile yeast can be used for many styles, reasonable clean at lower temps.
3787 - Great for dubbel - age really well
3724 - Saison only one i have used but i quite like it.
3463 - Forbidden fruit, love the balance of phenols and esters this yeast produces.
There are many more i will no doubt give whirl in the future.
Edit: Wyeast 4766 Cider - Quite like the cider this yeast produces, although my cider experience in very minimal.