I think a clockface is pretty easy to do with the spritebatch rotation around an origin. I actually have that in my game, but it uses 1000 interfaces in between, so nothing i can just post.
Yeah I think a 3 slider solution is the easiest to implement, I did that too
I have started working on my own GUI, I liked GeonBit a lot, but it's too performance heavy, for my 3d tests at least (It's easily good enough if you target 60Hz with a 2D game or simple 3d one)
This one generates no garbage, I use reflection for toggles / value changes and is super light on rendering, with other UIs it often dropped quite a bit (Geonbit for example dropped my fps from 8000 to 2000 for some UI alone, a comparable solution in this implementation keeps the 8000fps)