Who is the god of evil in DND?

Tharizdun Dungeons & Dragons 5th edition (2014–present) He is then listed under the Greyhawk pantheon as Tharizdun, god of eternal darkness, Chaotic Evil, with the Trickery suggested Domain and either a dark spiral or inverted ziggurat as his holy symbols.

https://en.wikipedia.org/wiki/Tharizdun#:~:text=Dungeons%20%26%20Dragons%205th%20edition%20(2014%E2%80%93present),-Tharizdun%20is%20mentioned&text=He%20is%20then%20listed%20under,ziggurat%20as%20his%20holy%20symbols.