Repentence blew hard this was peak.

REPENTANCE ROBBED MUDETH SO BAD. HIS MUSIC IS THE FUCKING BEST I WILL DIE ON THIS HILL

this is just slightly worse repentance so it's already pretty good for what it's worth

... When I tried this mod it really didn't change my mind, so I tried my luck with...

The best experience of playing isaac without dlc's

The true peak of Isaac. Repentance might just be this mod with more content, but the original incarnation is better. The Knife Pieces aren't so arduous to get (and there's a third one!), the Mausoleum has an entire back half to explore, there are a few interesting enemies which didn't return in Repentance, and the final boss is much cooler.
Not to mention that Mudeth's OST takes a fat shit over Ridiculon's. Well-deserved payback for throwing Danny Baranowsky out.