Define "well known"...like since the site started or just now? Asshole or nice person? Postings or amount of threads created? So many categories.
In the end, though, why does it matter? Each person takes what they want from this site....good or bad. Some are assholes, some are trolls, some create a shit ton of threads, some are extremely nice, some are cliquey....the list goes on. It doesn't matter who is well known, who is popular, or who makes the most threads. It just matters that we are here, that you find someone you can connect with or even just talk to casually. To know that there are others out there going through something similar.