I noticed some inconsistent tagging on characters from the My Life with Fel webcomic. Some of them are just the name, some are name_(character), and there are some that are overlapping with other characters/artists with the same name. Would it be alright if I did some housecleaning and changed them all to name_(my_life_with_fel)?

Absolutely. Go for it.

If there are names with more than one character, make sure to submit a disambiguation here.

Example: mocha -> mocha_(disambiguation)

Alright. I think I got them all, and I submitted two three disambiguation suggestions for the names with multiple characters.