I'm 6'7" and I've found over years of experimenting that the top tube length is most important to me for getting the correct size frame. I've actually ridden a 59cm framed bike for an extended length of time with no pain anywhere....but it had a 60cm top tube! Right now all of my bikes are in the 64-66cm seat tube length and 60-65cm top tube length and they all fit me superbly.
My .02 worth? "standover" height should leave you about 1" for safety's sake
, and your top tube length should be long enough to keep you comfortably stretched out, but not "reaching" too far....you'll know if you are.....