I'm doing a Bavaria game as well. I think I'm into the 1560's and I'm nowhere near forming Germany yet. All of the little states have alliances with big powers who I don't want to mess with. I had Emperor for a long time but in all my wisdom decided to switch to Protestant, and now I'll probably never get HRE back. Bohemia has a vassal, there's 2 electors that are reformed, I have Alsace as a vassal, only one voting for me.
If you don't already have it, take Unam Sanctum as your next (5th?) idea. Then convert the electors by force until you have a majority again. That NI also gives holy war against all heathens, so it's likely worth getting in spite of the papal influence being completely useless for you.