So are you saying Marc Davis created the concept art for all of the changing portraits that George shared?
EDIT: I’ve never noticed Hatchet Man? Has he always been there?
Yes. Basically they're all discarded concepts for changing portraits. Marc did dozens, but only 5 ended up at Disneyland due to space and some simply being better than others.
Then for WDW's Mansion, the Portrait Hallway was redesigned with solid, windowless walls that allowed for 11 pictures to be hung (5 on either side of the hall, 1 above the doorway at the end). Due to the speed of the Buggies (you ride through this scene instead of walk), it was decided to replace the changing effect with one where the eyes would follow you, similar to the busts (which WDW got more of too, to fill shelf space in the new Library scene).
This hallway scene was changed in 2007 to be more like Disneyland's with windows showing a thunderstorm on one side and changing portraits on the other. Most of the Sinister 11 were moved to elsewhere in the ride with their eye effect removed.
Tokyo's Mansion is largely a copy of the 1971 WDW original with only minor revisions, including the decision to hang those same portraits at odd angles. Nightmare Before Christmas characters replace them for that ride's Holiday version.