1. Ketamine
2. DMT
3. DOC (or maybe LSD. Only one though, and they felt so similar I am not sure I could tell them apart. Or maybe my LSD was actually DOC)
4. Poppies (I am sure most other strong opiates would be as good or better, but this is the best one I have had)
5. Mushrooms or 4-ho-mipt (So similar I don't know I could tell them apart)
I feel like there are a number of others that could just as easily go into that list, out of the many I have tried. (DPT, 2C-E, MDMA, DXM, Oxycodone, Mescaline)