The 7 Faces Of Doctor Lao was one of my favourite films when I was a kid and I still love it.
Being about a mysterious ancient aeon spanning eccentric, who has multiple incarnations, travels with a dimensionally transcendental home, feigns stupidity or weakness to confuse and confound his foes and has a Yeti and the Loch Ness monster featured, who drops into a town and leaves after sorting out a mess.
I'm kind of pre-programmed to liking him.
The book The Circus Of Dr Lao is much less family friendly though and well worth a read (though possibly impossible to film).