Flubromazepam is nice for sleep (certainly better than diclazepam) although you might find it lasting too long, 8 mg should be more hypnotic than 10 mg diazepam (overall I'd say that diazepam is more balanced while flubromazepam has more pronounced hypnotic effects). The come up can also be a bit long so don't think it's not working just because you're not asleep in 20 min. It's also not really the kind of benzo that knocks you out (insane doses excluded), so don't expect that. If you can get any, norflurazepam is even warmer and fuzzier than flubromazepam (potency and duration are about the same).
Fonazepam and nitrazolam are another two nice benzos for sleep and might be worth looking into. Both act faster, don't last as long and are more potent (but not crazy potent).
And then there's of course flubromazolam/clonazolam/flunitrazolam if you want something extremely strong (flubromazolam is like flubromazepam on steroids, does everything flubromazepam does but does it faster, lasts less (about 8-12h) and is crazy potent; clonazolam is perhaps slightly less hypnotic than flubromazolam but is also slightly stronger, the timelines of both are pretty similar and which one feels better is a matter of taste; flunitrazolam doesn't last as long as the previous two (a few hours), isn't as potent as predicted but is still very potent, it's probably the most euphoric of the 3 and rarer so it's a bit of a waste using it for sleep). These 3 are all very strong and can mess with your tolerance so saner benzos wont work well for you after using them (doesn't happen to everyone but happens often enough that it's worth saying).