I missed a few others. Here is a definitive list.:

70'sEasyPop
70'sSwingPiano
80'sPianoBallad
80'sSynthPiano
AfroCubanBB
EasyPop
EasySwing
ElecOrgBallad
EtherealHymn
EtherealSynth
GlamPianoRock
JazzGtrClubFast
J-PopHit2 *
Learning2-4 *
Learning3-4 *
Learning4-4 *
Learning6-8 *
LightBallad
ModernOrchBld
MORWaltz
PopBallad
PowerBallad1
SlowBarBossa
SlowOrchBld
Standard8Beat

*Style exists on Tyros 2 but not on Tyros 3.

Beakybird