[tilia]

I don't know what's available digitally, but a couple of my favourites:

Osamu Tezuka - I’ve liked everything I’ve read of him, but I *love* Phoenix. Also Adolf, Buddha, Apollo's Song, among others. He’s often called the godfather of Anime, and was very productive. The Complete Manga Works of Tezuka Osamu apparently contains 80.000 pages, and it’s far from comprehensive. A lot of it is not translated yet, but more and more are coming out in English. There was an ipod-app that gave you access to a lot of his work for a subscription fee, but I read that it didn’t work very well, they may have fixed it.

Gilbert Hernandez. Palomar 1(Heartbreak Soup Stories) is a good place to start.

And even if you can’t get it through the app you’re using, I also recommend checking out Strangers in Paradise.