Just like the title says. Let us begin.
Warren Ellis: Calm down. Breath. That's it, deep breaths. Hear me out. Now that we are some distance out from the whole fiasco and have had time to really look at it I have to say what Ellis did in his personal life with other consenting adults is none of my business. The dude can write and would be eager to prove himself again and Marvel can always use a good writer.
What would he write?: I'm thinking an X-title. Marvel has a bunch of those.
John Byrne: He can write. He can also still draw better than at least sixty to seventy percent of most of the artist Marvel has on their titles.
What would he write/draw:Prince Namor The Sub-Mariner. There was a time when I would not shut up about how great the Ron Marz/Ron Lim run on Silver Surfer was. One day Marvel decided to put them back together. Go look at the results, I'll wait. We all know who has the best Namor run.
Feel free to bring up names of creators that you think would really be of use to Marvel.