Pete Rose -- The Autograph King?

[BillyCoxDodgers3B]

Ruth signed a ton, but only made it to his early 50's.

Feller lived nearly twice that long and was part of the card show and insert card boom. He rarely charged more than a few bucks an autograph, whereas Rose's price was a fair amount higher. Feller would also try to sell stacks of pre-signed pieces which he'd bring to shows and signings and would drastically drop the price if you bought in bulk! On top of everything else, Feller often did free signings at events where he was paid a flat rate by whoever was hosting the event, so even more stuff was signed because nobody turns down "free". Rose seemed to shy away from doing those sorts of events for many years.

TL; DR Ruth died too young to hold the title. Rose lived to 83 but charged more than Feller, who lived to 92. Feller is the king by far.