Well, I had a hot and heavy fling back in the mid 1970's with a guy who had yet to become a porn star. His name was Richard Locke, but he should have legally changed it to "The Best Recreational Sex You'll Ever Have!" He ended up in all three of the now famous Joe Gage Trilogy films: Kansas City Trucking Company, El Paso Wrecking Company and L.A. Tool and Die. As an actor he was -- well, let's just say he tried. But as a porn star he was well on his way. I never saw much of him after he became "famous." But a day doesn't go by when I don't think about him. He was a decent, nice guy. He died in the early 80's? Maybe he lasted until the 90's. Not certain.
As for famous porn personalities, I have had the fortune and misfortune (but mostly good fortune) of enjoying the company (not sexually) of Chi Chi La Rue. He's an incredibly funny person -- whether he's in or out of detox. Mean drunk, though. Those creative types always require lots of patience, but they are usually worth it.