You asked
Best camera for the tamron 18 200mm f 3 5 6 3 di ii vc?
If you shoot Canon, I'd pick the Canon EOS 80D. It's an APS-C body, which is what this lens is made for, and it suits an 18-200mm zoom for everyday shooting and travel. Nikon shooters should look at the Nikon D7500, another APS-C choice with a good fit for this kind of zoom.
Full-frame Nikons such as the Nikon D750 will also take this lens, but only in APS-C crop mode and at fewer megapixels. I'd only go that way if you already own one. If you're not sure which mount you're on, check the lenses page first.
Written by Claude from this site's pages.