I'd throw our 2014 as well. It was long ago and JBJ was jerked around a lot that year- due mainly to his horrible offense from 2013-2014.
Out of 70 OF'er with 1500+ PAs from 2015-2018, JBJ ranks 38th in OPS at .772. Others close to him are Josh Reddick, Adam Jones and Nick Markakis.
JBJ has been, despite his streakiness, a pretty much average hitting OF'er. If you drop the sample size down to 1,000+ PAs, the group numbers 113, and JBJ places 50th.
I'm not here to say JBJ is some great offensive talent, but he has had a couple seasons over .835 and he is still in his prime.