Great idea! Something I haven't seen recced here yet is Gail Simone's first run on Birds of Prey - from 56-108. It's a really stunning run, with character development and thematic richness that isn't found very many other places. Only caveat is the art can be a bit inconsistent. But it's really, really enjoyable and well crafted.
The Rucka Wonder Woman run is also amazing (actually, both of them are - the first one from the mid-2000s, and the second one from Rebirth).
Andreyko's Manhunter is really delightful - but make sure you track down the last volume, which was published as backups in Streets of Gotham 1-13 but never collected in trade. Streets of Gotham is really fun anyway, so I'd recommend buying the individual issues both for themselves and the last volume of Manhunter.
Lastly, this is a new comic for me, but it's been out for a while - Ellis and Cassaday's Planetary. Really, really enjoyable, and if you're a Batman fan, the Batman/Planetary crossover is well worth it as well. (Didn't like the Justice League crossover, though.)