I love Mudeth's tracks. Let's be honest: some of them might not fit entirely with Isaac's theme (like the one from the Caves). But then others are even better than Ridiculon's (one that definitely stands out is Shadowdance, which i personally prefer over Duress), so it's a rather interesting soundtrack.
Also, Mudeth has the best track for Corpse, period! Ridiculon's and RENREN's are great, but they're nowhere near as intense and as bone-chilling!