Threads like this are so dumb because most psychedelic experiences are subjective and there is a neverending spectrum of quasi-legal "research chemicals".
"Research chemical" means fuck all. Some are legal in some jurisdictions, some are banned. They are all mostly analogs of existing psychoactive stimulants, most of which are controlled...
Anyway. Worthwile drugs, sorry "research chemicals", include
Tryptamines like 5-MeO-DMT (controlled some places), 4-AcO-DMT, 4-AcO-DiPT, and so on and so forth. MET, DPT etc also exist (as well as the 5-MeO and 4-AcO vers). 4-AcO-DMT is metabolized into psilocin and is therefore very close to a "clean" mushroom trip.
Phenethylamines like the 2C-x series. Some report unpleasant stimulation/bodyload with these. However there are a derived family of compounds called the 25x-NBOMe series that are highly potent 5-HT2a receptor ligands comparable to diet LSD.
The N,4-dialkyl cathinones are pretty standard triple releaser (mostly just serotonin/norepinephrine though IIRC) entheogens. Methylone is also included. Think weak MDMA mixed with stimulation.
MDPV and the related longer-chained stuff like Pentylone, Pentedrone, butylone etc are all pretty vanilla stimulants that can end up with you compulsivly redosing to the point of heart attack/psychosis if you're not careful.