Steve Rogers "It's Been a Long, Long Time", sung by Kitty Kallen. Definitely. Steve has to fight that type of paralysis daily without external help accentuating it. Not unless they've asked, but those who've lived at the Avengers base with him have definitely heard it a couple times. He'd definitely need the song.
Varric Tethras - A drinking song. Any drinking song, really, but he's got soft spots for the anthems of his favorite taverns (mainly The Hanging Man). - Possibly. Varric's had a few overly dramatic and awful experiences that would definitely be exploitable ranging from family conflict to world-ending disasters. - Anybody who played cards with him while drinking probably know at least one. - As a Dwarf Varric's resistence to outside influence would probably leave him a bit dazed and unfocused, but he would likely find it easier to shake the effects for a few moments of clarity here and there.