[Closed] Flat pedals that are tapered... and not too grippy?!

So, with me ever-ongoing knee issues, I thought I'd try something different.

Always used clipless pedals (Crank Bros or SPDs) believing that the float is very important.
Tried some cheap, flat pedals many years ago, but hated how they pinned themselves to my trainers and prevented any float.

So any recommendations for some flats that aren't too griptastic?
Also, are there any available that are tapered, ie. the top face of the pedal slopes down to the outside? That would help with my poor knee alignment.

Thanks in advance.