Well, if any of the teams takes the same approach as the Ravens, which is selecting best player available instead of taking a need-based pick, that practically all of them would take Ramsey. Its unlikely any of them would rank Stanley or probably most of the other players ahead of Ramsey.
Dallas in particular makes all of the sense in the world, and for the very same reasons you described. They have Carr and Claiborne, who are both terrible corners. Claiborne resigned to a one year deal for chump change, and they've been asking Carr for a paycut for years. Its the equivalent of saying the Ravens are set at corner because they have Jimmy Smith and Shareece Wright, of which I'd rather have both of those guys over any of those two corners in Dallas. Their best corner is Scandrick, though he's been injured. They also have virtually no safeties.
I don't know what SD will do I can't see Ramsey making it past Jacksonville or Dallas.
lets hope he does because he'll solitify our backend and passrush is deep in this years draft