You asked

Best camera for the canon ef 16 35mm f 2 8l ii usm?

This lens is built for full frame, so I'd start there. The Canon EOS 6D Mark II is a sensible everyday full-frame body. If you want more, the Canon EOS 5D Mark IV is the one I'd look at first. The Canon EOS-1D X Mark III is built for sport and action, so it's overkill unless that's what you shoot.

If you're on APS-C, the Canon EOS 80D works, but the lens becomes roughly 26-56mm in full-frame terms. That's a useful standard range, not really a wide-angle one. If you're unsure how crop sensors change focal lengths, the Sensor sizes guide explains it.

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