Finding an alternative for CharacterController.Move()

So I'm making a game with my own simplified physics because I need full control and knowledge of what's happening in each frame, but the one thing I still need to "ask" Unity to do for me is applying the actual movement which I calculated, in each fixed frame. I use the CharacterController component, only because it has the CharacterController.Move() function which I can move something with, slide it along walls if a collision happens, and also get the collision's normal. The problem's that I don't like this component. It has "weird" slope offset and step limit variables which are trash to me since I'm the one that'll be doing such checks IF I want to. Basically, I need a function similar to CharacterController.Move(), which only asks for a radius of a hypothetic sphere collider it will use to calculate the final position, having considered the slide it would do if it hit a surface during the movement. And which returns the collision normal (for now let's ignore multiple collisions).