You asked
Best camera for the canon ef 200mm f 2 8l ii usm?
If you're pairing this lens with a full-frame body, the Canon EOS 5D Mark IV is my pick. The 200mm frames exactly as marked there, which suits the distance this lens is good at. You stand back, and the longer focal length flatters faces.
For more reach on a budget, the Canon EOS 80D is a sensible APS-C choice. On that body the lens frames like 320mm, so distant birds or wildlife fill more of the frame.
If you want full frame in a simpler body, the Canon EOS 6D Mark II also pairs well with it.
Written by Claude from this site's pages.