Pentax k1 is the best and you add manual primes for next to nothing!
Generally the best cameras are overkill for product photography, because in this case lighting can be well-controlled and one can photograph at low ISO with any shutter speed with use of a simple tripod. You could even do focus stacking and frame stacking for increased resolution.
Yes compact cameras with small sensors are great to get wide depth of field for product shot, it's true. But a real detailed shot with 30+Mpixels is really nice in order to cropability and for added texture too. A FF camera is always nice to have if you are a photog anyway 
I never said anything about compact cameras--that's going to the opposite extreme. I was mostly talking about entry level crop DSLRs from a few years ago being perfectly good for product photography, since that's how the discussion started (D3300, which has a really good sensor--combine with a good prime lens and macro lens, a tripod, some decent light, and it's a great set up).
(Why would you crop much for product shots where you can compose exactly as you wish? I've been content with 16MP for general photography, having had up to 28MP (NX1), even for some cropping. Photography is my most serious "hobby", and I do keep in touch with a few photography forums and camera news, but while wanting the latest and greatest is usually true, it's good to know what suffices for specific tasks.)
