Try Moon+ Reader Pro, Byron. It supports custom fonts, there is a "publisher defaults" view, and you can selectively enable or disable certain CSS properties. It's unlikely to be a 100% perfect e-reader, but I love the plentiful display customisation options in Moon+ Pro, so when you read books in it, they don't resemble Notepad files in the slightest.
I especially love the background textures in Moon+ Pro. You can load your custom ones, too. Here are a couple of screenshots:
https://www.mobileread.com/forums/sho...84#post2635184
Looks like real books, doesn't it?

And here are a few more Moon+ Pro screenshots:
https://www.mobileread.com/forums/sho...37#post2635937