I'm 6'5" and I use the long version of my sleeping bag. I'm not sure exactly how long it is, but I think it's somewhere north of 80 inches. I'm looking at either a Squall 2 Tarptent or a Cloudburst 2, but I'm not sure it will be long enough for me. I used a Contrail for a while and honestly can't remember how much of an issue the length was, I have a nagging feeling that it was a problem that I noticed (head or feet hitting putting pressure against the mesh) but I just don't recollect that well.
I know the Double Rainbow would work but I don't like the weight penalty for when I'm going out solo. I nearly bought the Vamp Tarp on sale but I'd like a tent that works for two people too. For what it's worth I'm using a Big Agnes bag now which helps with pad/bag mismatches and keeps everything together. Any tall users that can comment on the Squall 2 or Cloudburst 2?