Wow, you guys are all over the map with the top 50! Looks like every song got some love, which is a real testament to the diversity of TFF. There's something for everyone.
Anyway, I think that The Talisman is a lock for me personally, and TMWWBK and WTWWB would probably make the cut as well. Isle, Starblind, El Dorado, and Coming Home would all be just outside of that range, but then again I don't have an actual list. I'll need to really work my way through the discography again to see what stands out; one of these days I definitely want to put together my own top 50.