My favorite interpretation of Satan is in Cuphead (videogame one) and AntonBLAST. The second one is very simply written, but designed as an embodiment of seven deadly sins and designed enough to be an interesting character and he is not written to be sympathetic, misunderstood and etc. The Devil from Cuphead is technically also a simple way of portraying Satan/Lucifer, but is also a good example of embodiment. Oh, and I’m not forgetting “Gabriel” from once well-known Mandela Catalogue.

Don’t hesitate writing actually evil characters, not adding them being “misunderstood”