Hello and thanks for the question! I am going to add a page for this in the wiki as this is the kind of question I often get, but I'll reply to you first here.

There is no mod incompatibility, that is you can run this mod with any other mod.
This is different from "will the new [insert modded mob name] types have the modded features from your mod?". To this question, it is completely mod-dependant. I'm doing my best so that any modded mob will be compatible this way, but if a new zombie type is added, but not based on vanilla zombie, then my mod can't know it should apply to this new.

• Skeletal Remains: ✅ The only thing to note is that the Spectral arrows that should be only for regular Skeletons in my mod can apply to any of these new skeletons.
• Rotten Creatures: ✅
• Enderman Overhaul: ⚠️ My changes are Enderman specific for now. I just found how to make this more compatible, so it's going to be compatible in the next version! (releasing soon)
• Creeper Overhaul: ⚠️ Chain explosion should work. Explosion effects should apply only to the regular Creeper. Just like others, I didn't test but just read the code, I might be wrong. However, it seems that the new creepers variants override a lot of the base code.

[EDIT] Here is the new Wiki page Mod Compatibility