Are you referring to a cross trainer? Im not entirely sure what an elliptical machine is...
Anyway, I haven't got an exact playlist but I find NF to be a great song on the treadmill as you can easily stay in time with the beat. Also, the outro of Home and bridge of FWF are quite upbeat and inspiring to run to. I tend to stay away from the quieter or more instrumental songs as you can never hear them over the annoying gym radio station.
Id love to know what you eventually put in a playlist, I might get some inspiration!
Hope that helps a little bit