There's not much to write as far as this subject goes, so I'll simply offer my top 3:
1) Freak show- Here Ben Grimm is feeling sorry for himself and goes on a little journey where he meets freaks,farm animals...and skrulls.There's a nice 'judge not' message as well.(come on Marvel,get those rights back from Fox)
2)The Book of Thoth- Dark Horse published this one,and it is stunning.It's basically the history of Thoth Amon, Conan's arch-nemesis.Although Conan never actually appears in the series, it is non-the-less a very compelling, emotional story which is good screen play material.
3)Red Sonja vs.Thulsa Doom- Yes,it's a bit obscure, but this series from Dynamite is chock full of very interesting,unique characters,multiple sub-plots and a great story with a dramatic climax.
All though I think these three choices would translate well to film, my pipe dream comic mini-series to movie would have be...
ANNIHILATION!