We use a Canon 6D at each of our campuses.
We bought the body only and coupled that with the EF 24-105mm f/4L IS II USM which does a great job for most photos.
For sport / longer distance we have the EF 70-200mm f/4L IS II USM
This is mature technology now, but still does the trick and gives good quality full-frame photos that can be easily edited.
If I was starting from scratch, I might consider a mirrorless camera as that is where all the R&D is going now. However, it is more expensive and the 6D still does a very good job. We have had ours for maybe 4 years or so, get it serviced every now and then it they do the trick