[member="Magdalene"]
Hi!
I'm not sure if by unaligned you mean factionless or simply unaligned in the Force, but if it's the latter I can offer Evoros here. She's more inclined towards the dark side but on the whole relatively neutral and keeps her darksideyness very quiet, and although her own principles are very pragmatic and Sith-like she'd give any students the freedom to explore alignments and philosophies.
As for teaching, Evoros is not going to be a kind teacher and will say so from the get-go (she's a spy, so a lot of lessons would involve throwing Magdalene into the deep end with missions and such), but has plenty of knowledge to share and ultimately would want her apprentices to grow powerful. Most of her skillset is closer to the mentalism end, so if you're looking for a warrior-type figure then she's not your best bet, but she has plenty of tricks up her sleeve. She'd also definitely be looking for a chance to free slaves.
If I sound like your Huckleberry, let me know and we can brainstorm details. Otherwise, good luck finding a teacher, hope her story takes off!