Mordo isn't quite the beast that Classic Strange was, but he was pretty close to his level at times.
PG
psycho gundamThe Nightmare of Solomon
baraon mordo is a rival of doctor strange, but he practices mostly the dark arts.
imo he can take a couple wins if he goes all out, i've seen strange do things to silver surfer that could easily give him wins against him and mordo is a peer of his.