How's this for a fix for George?
Knowledge Is Power currently reads: "Any Phase: When spending a Clue token to add to a skill check, George may add +1 to the result of one of his rolled dice instead of rolling an extra die."
Change it to: "Any Phase: When spending a Clue token to add to a skill check, George may receive one automatic success instead of rolling an extra die."
It expands on his "sure thing" advantage, which Kevin* said was George's strong point.
What do you think?

! Under "Investigators" tab, there are two colums, "Most Used" which shows the number of games each investigator has been involved in and "Most Effective", listing win-%. George Barnaby has been in 117 games as of 1 April (least of any investigators).