4mg clonazepam is way too much. More like 0.5-1mg but not too fast acting. Unless, of course, you have a huge tolerance.
Ativan is a decent option, 1-2mg to start, up to 4 if necessary, and it can be given i.m. if you have the proper formulation in vials (few will.)
Valium is ideal, 10mg-ish to start or more with tolerance, 5 if you're small or sensitive, up to 30-40 if you have a high tolerance. Librium probably OK too.
Bromazepam is good if you can get it.
A hypnotic like temazepam or Dalmane might be a decent option to knock you out totally, but I'd go with the anxiolytic options above.
Don't combine with booze or other downers.
also useful: hydroxyzine, an antihistamine sedative with 5ht2a antagonist qualities
anti-psychotics can be of some utility in the management of acutely agitated states, Leary recommends 50mg chlorpromazine i.m. which is probably a good starting place, in a clinical setting I'd use haldol 5/ativan 2 i.m. q1-2h until the patient is no longer agitated. Thorazine is appealing because it is promiscuous across different receptors, as LSD is albeit in the other direction, haldol a bit less so.