Stephane Grappelli. There are countless greats chosen above-and I appreciate virtually all of them- but; Stephane was a very unique genius playing an instrument that's revered for it's wide ranging emotional impact. I saw him live outside London, England, near the end; sat immediately in front of him, was lucky he made the connection, and mine was the only program he signed. The only autographed item I have. Most interesting; his stage manager was a Canadian.