I'll share a little known secret with you. Those lenses work pretty well on Canon bodies as well. Don't tell anyone. It could make Canon the industry leader...Interestingly, Sony is still one of the best cameras to use with Canon lenses.
Three of my favorite lenses for Sony a7R cameras are
Canon 24-70L II
Canon 100L IS
Canon 100-400L II
And until Sony released the 135mm GM and Sigma, the 24-70 for Sony, those would have been my three favorite lenses for Sony (okay, I'm digging on the Sony 200-600 for birding too). I have been so blown away by the IQ that I obtain with those EF lenses on A7R bodies. Breathtaking and phenomenal!
Please don't shoot the messenger!