I think Eye Teeth had a keyboard player who stood offstage.
their Threnody cd and some various other tracks. Here's a list of band members:
Todd McNaughton - guitars, piano, keys, programming
R. Michael Gouin - vocals
Sean Campbell - drums, samples
Gregory Cloon - bass
Kevin Herwick - keys, additional programming
Keith Leonard - bass on Threnody cd
LT EXLCUSIVE - A SONG FROM AMALGAMATE