"Legends"? Very difficult to tell, but the nature of P4P and the constant flux of the community suggests there will be very few, at least in a normal definition of the term. "Legend" suggests one of whom most members of the community would know, even long after they are no longer on the scene; someone about whom we tell stories and whose fame will endure. It's a much higher standard than "favorite" or "ATF" and suggests a wide-spread view of the person as a legend, rather than a personal preference. If you're a baseball fan, Ted Williams, Willie Mays, and Babe Ruth are legends -- most of us know who they are, even if we never saw them play. Alex Rodriguez? Few people will remember or talk of his exploits 25 years from now.
The pseudonymity and transience of P4P, with lots of people entering and leaving the community each year and focusing on now rather than focusing on the past, suggests that few will be remembered 10 years after they leave. Ten years ago, the stars of the Dallas independent scene might have included people like Ashley Ash, Savannah (those chaps!), Tabitha Toy, Hooter, Rebecca, Violet Star, Cayce, etc. Just about everybody knew of them, even if they had never met them. One might think they were prime candidates to be legends. Some of us still have very strong memories of them and may have for a very long time. But P4P doesn't have the historical emphasis that baseball does. They were stars, but other than a few old-timers most of ECCIE Dallas has not heard of them. Are they legends?
Many of the names listed by others in this thread may turn out to be legends. But 10 years from now, their memories and stories may have faded as much as the list in the last paragraph. It's hard to predict, and we tend to over-estimate the "legend" potential.