I've wanted to seed a themeless with 28-Across for a while. Even if he's not well-known enough for any publication's liking, the name-nickname combo is too fun to pass up. My other favorite entries in this 70-worder are 34-Down and 12-Down (former 12-Downs, unite!).
Also, if you want to learn more about the history of 11-Down referenced in its clue, check out this piece from 2018. Enjoy!
down clues only, for all you overachievers