Dory Funk Sr. gives me the impression of Terry and Dory Jr.'s love child, and I mean that in the nicest way. Dory's look and Terry's personality. I suspect he could go in the ring, but we've only got eight minutes of footage to back that up.
Best one not yet mentioned: Rocky and Dwayne Johnson. The younger Rock is an all time great. His dad is a fringe Hall of Fame candidate in his own right.
Edit: One more, Tony and Matt Borne. Matt was very good. I've never heard anyone talk of him in higher esteem than Tony.