I really like Bluesbreaker-based circuits in general and have tried most of these (either PPCB, retail, or both). My thoughts:
Bluebreaker - ironically, one of the few I have not got around to trying out yet
Paragon/Paragon Mini/Pauper - have owned a couple of KoT and PoT's as well as built all three. It's really good. To my ear it seems to be one of the "fuller" sounding variations and IMO shines the most with a bit more gain than the others. In general I like Bluesbreaker type drives as a fairly low gain, "just-past-edge-of-breakup" type of sound but I think the KoT/PoT sounds best with the gain dialed up a little bit (and in the same way I think it does slightly gainier sounds better than most of the other BB-types). It doesn't do a lot for me in "boost" mode but like just about every other setting.
Parthenon - the only other one I've not tried
Pro-10 Blue - probably my personal favorite. I've not tried the retail version but have built both the Pro-10 Blue and Dual and it's probably been the longest-lasting drive on my main board at this point. Has a lot less options than the rest but is really well-tuned and you can dial in a great sound super fast. I do find it to be a bit on the bright side and I rarely will have the tone control above or even at noon.
Kings Hand - I've not owned the retail one nor have I tried it from PPCB but have a build of Aion's Gladiator (Duellist) which I really like. Compared to the Protein and some others I find it to be voiced on the warmer side. I can't decide which of the EQ settings I prefer the most and find myself flipping between all three quite a bit honestly.
Glory Hole - Owned a retail one, built one too. Like I mentioned above regarding the KoT/PoT....I think this is one that is best at fairly low gain, like lightly broken up rhythm sounds. It is on the brighter side as well but stacks pretty nicely. I used one or the other for quite some time and was relatively happy with it.
Pot and Kettle - Haven't built it but owned one a while back. Probably the most versatile and full-featured and I really liked it. Don't remember why I sold it tbh, probably just got bored

I do think that personally I tend to get a bit of option paralysis with pedals like this and often don't care for having such granular control over everything, but some folks really like that, so I guess it just kinda depends on your personal approach.
If I had to just keep one (assuming single stomp size) on my board it’d probably be the Pro 10 Blue, with Pauper being second choice.