Heres my proxy mini for a gloomhaven boss called the "The Betrayer".
Although intended as a replacement for a carboard standee in gloomhaven, it would look just as good in another table top game like DnD as a caster/mage/sorcerer/warlock.
UPDATE: I've now included a based version of this model now too, both supported and without :)
Have a look on my store for the other proxy minis and bases i have created for gloomhaven and other games.
Mini currently stands at 36mm tall, so if wanting to use for DnD, i'd recomend scaling down to around 85%.
I've attached a supported version too, made in prusa slicer and then exported as STL.
Please note, i am not affiliated with Cephalofair Games (Gloomhaven) in any way, this is fan made.
Any issues in printing with the pre supported varient, let me know and i'll try and fix them up. I have already printed this numerous times in slightly different ways and all have been perfect so far.
Printer: Anycubic Photon Mono x