Are talking about current season even? Plumlee isnt on the Nuggets. Bench this season consists of Monte, Campazzo, Dozier, Sap, Green, was Hartenstein, now a bit of Mcgee, and Zeke, Rj (before) occasionaly. Only Monte in this group stands out offensively.
As for defensive stats, most metrics back Jokic up as a positive even with on off data, such as LEBRON, EPM or RAPTOR. Now not a single model is a truly realiable for real defensive estimation, but these are definitely decent and give some insight. Has had positive DRAPM and DRPM over the years too.
Now for more quantifiable defense, you can look up Jokic's defending the pnr and Jokic isolation defending numbers. They rank elite. There is nothing sugercoating the fact that people dont score well on Jokic in isolations or that he defends pick and rolls well.
You said you like Jokic, you should know this, he is really really bad at rim protection, but on pretty much everything else defense wise he is average or good. You know he has top bball iq, so he has great positioning, anticipation, doesnt bite on fakes, has godlike hands, best center steals and deflections wise, he is strong and moves his body well.