Uncanny X-Men - good the way it is.
Amazing Spider-Man - Dan Slott and any decent artist who can produce a book a month consistently. While Slott hasn't had a huge amount of commercial success, he's extremely talented, and I attribute his low sales to the fact that most of his stuff is on the periphery of the Marvel U; ie, (mini)series about characters that are either pretty anonymous (the GLA, She-Hulk) or get so many miniseries that they get lost in the shuffle (Spider-Man). Amazing Spider-Man has such a solid commercial base that it's hard to see him miscarrying.
Incredible Hulk - don't care.
Black Panther - don't care.
Fantastic Four - don't care.
Daredevil - don't buy this, but Brubaker is aces in my book, so he can stay.