Some of my favs, and Yamaha Tyros2 styles I use to play them:

Stevie:

Superstition (Soul Shuffle)
Part Time Lover (Detroit Pop1)
Everything from the "Songs in the key of life", esp Isn't She Lovely (Lovely Shuffle)

Elton:
Rocket Man (8Beat Ballad)
Daniel (Yamaha Pop Bossa1 style)
Candle In The Wind (Piano Ballad)
The 2010 Elton John/Leon Rusell Album: The Union


BIlly J:
New York State Of Mind (Slow & Easy)
It's Still Rock & Roll To Me (Rock Shuf Style)
Just The Way You Are (Pop Bossas1)
When You Wish Upon A Star (ok that's Disney tune but Joel recorded it)
Piano Man (among top requested songs) I use a Country Waltz on this one