Ten Hag looks a good option, I really thought the ceremony around his contract extension put to bed our chance of bringing him in, but I think he'd suit lots of our players. (Sess, Ndom, Gio, Berg, Skipp etc.). Seems a detailed coach, has adjusted his team a few times throughout different seasons, and very popular with his players.
Rangnick is a wildcard. Obviously I've not watched his teams closely over the years , but I get a feeling it could either go really well on the field with high energy exciting football, or we'll get that and also concede a silly amount of goals. All the same, I like his energy, personality, and it can't be a bad thing to have a guy with his brain around your club.
Still would be fairly happy with Potter, I think he's a good coach and will do well with better players. Ideally he'd have a top 10 finish under his belt, and the reality of their league placement does give me pause, but I've watched probably 15-20 of their games this year and rate him. Still, maybe a year or two too soon.
To be honest, I'm content with most of the realistic options now, with the sidenote that I'll be truly miserable if somehow they decide on Roberto Martinez.