ativan and xanax actually have very similar durations of availability. hence why ativan's one of the ones used for IV purposes-it's very effective and comes on fast without the blotto mental stuff alzo/xanax tends to be associated with. examples of orally-administered benzos in the longer-lasting category are good old valium/diaz and klonopin/clonazepam. both should do the same thing for 2x as long. however, if you just want to get knocked out, xanax and ativan are much more effective.

hypnotics like ambien(cr or regular) and lunesta are hit of miss to a degree, if that window they make you sleepy gets missed, you're just going to be foggy more than anything.

off-label people have luck with trazodone, no habit formation, but just doesn't work for some.

for my money, a small dose of off-label seroquel(25-75mg does quite a bit) is about the closest thing to hitting yourself with a ball-peen hammer and feeling fine the next morning without forming tolerance or habit. higher doses don't correlate with creating fatigue so while it's not unsafe per se to do so based on the range it's taken safely at, 500mg isn't going to help you anymore than a hundred. it's about as close to a tranquilizer dart you're going to get, and at low doses doesn't have any of the warnings it'd be wise to heed at 700mg/day if you're bonkers.