Juggs, Gamora, Mangog, Overseer, Tigra (if you want to learn her), Ultron, Electro and Guardian would be my recommendations
If you could awaken Dorm, I would do him (with all the awakening gems from SQ lately, it shouldn't be too hard to do). While he has fallen from the meta for top defenders, mine still gets a decent amount of wins, especially if you ban HT
SpiderGwen. And other neutralize or slow champs. Dr. Zola