I'm happy to say he's doing really well! The antibiotics seem to be working and the lick granuloma is clearing up nicely!
As far as his ear infection, we've been using the medicine and cleaning his ear every day. I've even started cleaning out the other ear every few days. I'm going to have to invest in some long q-tips or something, because it's actually kind of tough to clean out his ears. For those who don't know, dog's ear canals are actually L shaped, so you have to really dig in there with cotton wrapped around your finger.
All in all, I think he's doing great!