I think I've now printed all of the normal and most of the "difficult" filaments;
- PLA (+variants (silk, wood, etc)
- PETG
- ABS
- ASA
- HIPS
- TPU (down to 80a)
- PP
- Nylon (PA-6 & 12)
- PC
I have also used most of the CF & GF infused variants as well.
I have not used PVA as I don't have an AMS/MMU and I don't know of many other users for it.
On the list that I'd like to try but haven't needed; PEEK, PMMA. I am sure there's a smattering of other less common engineering materials but I haven't run into them.
PEEK looks like a helluva challenge, esp. Without a heated chamber. But overall not bad for a hobbyist with a heavily modified #Ender5.