Uther's Father

[Rafael]

Yep. It doesnt seem like there was any Baron of Blackmoor between Fant and Uther. Fant is eventually driven from Castle Blackmoor which is probably vacant for some years before Uther takes over the place.

That's correct. However, don't ask me where I read it.
Uther takes over AFTER the end of the FFC, and a while after the FFC group had returned from Lake Gloomy.

But when exactly... Old Rafe is old.