I haven't seen the rest of the shows on your list, but as a fan of Offspring, Nothing Trivial, Step Dave, and Catastrophe, I'll ask have you already seen?:
Wonderland (Australian friend drama, interesting charters, great scenery and eye candy)
Sisters (Australian, about the family that results from a a reproductive health doctor using his own sperm in his fertility clinic)
Party tricks (Australian political dramedy starring Asher Keddie from Offspring)
Fresh Meat (UK, college comedy, there's just one episode you might want to skip if you have any fears of the dentist)
Class of '07 (Australian girls school reunion stranded during the apocalypse comedy)
I think that list is roughly in order of how I'd rank them.
I'll have to check out some of your dramedy list.