I’d go Hunter.
Hunter. It will always at least be mid.
If you want to PuG M+, having a Lust is what all M+ players want. MM hunters is very decent right now on any content.
Also Hunters have Feign Death. You saw those thread from people complaining they cant get out of combat. Hunters dont have such issues.
Hunter gets pets. Unholy DK also gets a pet, but can also tank and is near top MDPS. If I had to pick, I would probably make a Gnome hunter just for the pets and mogs.