Recommendations similar to DiBiase-Duggan Feud?

Yeah, Lawler vs Dundee will absolutely give you exactly what you want.

I understand where you're coming from with Colon. I don't have the same response to him but I can understand that POV for sure.

Some stuff you may want to check out if you haven't already:

For a different Puerto Rico recommendation, try Invader 1 vs Al Perez - one of the more shockingly great matches I've seen because you don't really expect Al Perez to be in an awesome out of control brawl but there it is
www.youtube.com/watch?v=Wa7j9MLYNTI

Because it's the same guys in Mid South but with different opponents, you may want to check out if you haven't seen:

Ted Dibiase vs Magnum TA (really any of these, but the double shot in Tulsa & OKC on 5/27/84 are a really cool thing to have)
Hacksaw Duggan vs Buzz Sawyer (11/11/85 is the one to watch)

The Tully vs Magnum rivalry is something to watch too. The famous I Quit match is definitely its own sort of thing but if you can find the 12/29/85 match that's just a badass brawl that might be something to check out.

I also think the Lawler vs Idol rivalry including the No DQ Match from 83 and the tags with Bigelow & Rich is the best.

Also can't go wrong with the Funks vs Abdullah & Sheik matches for insane crowds, blood and furious punching.