There are tons. Throwing a sus in is a nice way to embellish a chord. I'm not sure if you want the list limited to unresolved sus4s, or if sus2s are also in the running, but here are some off the top of my head.
More Than A Feeling
Last Dance with Mary Jane (sus2)
Can't You See
I Will Survive
Gonna Fly Now (Rocky Theme Song)
Sailing (Christopher Cross)
Faithfully (Journey)
Like A Rolling Stone
As to the suspended barre chords part of the question - you can play any of these as a barre. I guess maybe I don't understand the question?
Finally the open G question...are you asking if instead of playing a sus4 you can just play an open chord?
Sorry if I'm annoying just trying to understand what you're looking for.