Yeah, I don't know if we necessarily need to see movies of all of these characters - but I could see doing a few of these "lower tier" type characters/movies. I know there have been rumors of a Dr. Strange movie for awhile now, and I could see something like that. It obviously isn't likely to be a big summer blockbuster type of movie, but maybe a niche film. I saw a recommendation one time for Johnny Depp as Steven Strange, and that might be cool.
As far as the other characters go, it depends on how obscure they are going to get. In the case of a character like Iron Man, he might not have been very well known by the general public prior to the movie, and now he's pretty much "A list". I think characters like that have the potential to be "big", but others will likely stay second tier no matter how good the movie is. I could see movies on characters like Strange, Iron Fist, Luke Cage, Black Panther, etc....but Dazzler might be getting a little too out there. There is a lot of potential there, if done right though. I know reboots are the "hot thing" right now, and often unnecessary, but I wouldn't mind seeing things like Daredevil and Fantastic Four get another take.