Chaosmancer
Legend
That would also include: Pelor, Bahamut, Correlon Larethian, Tiamat, Asmodeus.
There's only, like, a handful of unique DnD deities. Trying to go for an all-trademaked pantheon would actually involve several long-standing DnD traditions.
Might be worth it. I know the Raven Queen from 4e (not so sold on the 5e version) was one of my favorite deities ever, and I was blown away by Mercer's rewrite of the names of the Gods in the Tal'Dorei book. Calling the gods "The Lawbearer" or "The Archeart" is so much more evocative to me than just using a name.