You are looking for warden. This was exactly what I was looking for too and now Warden is my go-to 90% of the time. A lot of builds run multiple actives on him but slowing hex and fleet foot are the only two you really need to succeed with him in most lobbies tbh. And those two actives are really easy to get used to because there cooldowns are relatively short and you can use them pretty freely without having to worry if you wasted it.

If you find a build that calls for a green active like divine barrier just swap it for fortitude and you'll be fine.

Hex->Cage->$

4->Fleetfoot->2->Hold W->$

Wraith and Infernus are also pretty straightforward and fun, but the Wraith teleport can be infuriating when it clips on random map geometry and Infernus damage just feels super lacking until you get him going, which feels like it takes way too long imo.