Karl Miller:

>For a research project...I am trying find or compile a list of well known
>individuals who were amateur musicians active playing chamber music.

Frank Lloyd Wright might qualify.  There were regular soirees at Taliesen,
for which he purchased multiple pianos and, in an instance of his "honest
arrogance," suggested that if he had not been a great architect he would
have been a great musician.

Jim Tobin