So far I found George Martins piano on Misery, You've Really Got a Hold On Me, Money, Not a Second Time, I Wanna Be Your Man (Hammond Organ), `A Hard Days Night, Slow Down, No Reply, Kansa City (barely audible) In My Life, 12 Bar Origional, The Word (harmonium), Good Day Sunshine (honky tonk middle eight), Penny Lane (John and George Martin), Being For the Benefit of Mr. Kite (organ and harmonium), Getting Better (playing the strings , not keyboard), Lovely Rita (honky tonk solo), All You Need Is Love,
This is what I have found through 1967. If I didn't have to work I'd go further but maybe tommorow.