Probably 90% of the game's population don't read forums (or maybe only their own guild's forum) or aren't interested in things like the pvp metagame and new builds. So these players will probably not know any player outside of their own circle. GW doesn't have a GW gazette in the game, so it is not easy for fame to spread beyond the hardcore players.
Famous players I can think of:
Lulu
Lulu is probably most famous (or infamous):
- For doing that lvl 3 ascension thing (people screaming "cheater!")
- For being the first or one of the first people running a good minion factory build (with other people posting screenshots and going "cheater, hacker, nerf!") and later for posting a video about it (or having a friend do that).
- For (perhaps) inventing IWAY. (the ultimate crime

- For being in a very well done FoC build video.
- For being in a nice flareway video.
- For supposedly joining guilds and 'stealing their builds'.
- For having other people posing as her/him on this and other forums, having people claim they are a friend of her/him, other people then saying that the first person is talking nonsense (as they themselves are personal friends, etc.), people saying Lulu has done this or that wicked deed, others saying she/he could not have done it as he/she does not play pve, etc.
If someone like that is not famous, no one is. Ask a hardcore pvp player, and there is a good chance he will have heard of her (or him). I don't know if Lulu is a girl or a guy, though. Maybe it is a couple sharing an account.
These are fairly well known players, maybe famous:
Kuntz
Kuntz is a friend of Lulu I think. I could be wrong, but I think he may have made some of these video's.
God Antipowers
Well, the reason may be a bit silly (if you level up to 20 in pre-searing you obviously don't mind repetition), but he/she has been talked about in and outside of the game a lot.
Power of my Rangers
Well known European server ranger spiker. I had talked a bit to this player, not knowing that he was famous, though his name rang a bell at the time. He did appear somewhat smug, but I guess he has some right to behave like that. Otherwise he was fine, though.
Chris Nin00
I think he is the one who came up with flareway originally, but I could be wrong. Famous on this forum certainly.
Kago Seirei
Obviously well known, but I have no idea what for.
But except for Lulu (who is more famous than her/his guild), it is guilds that get the real fame. And the fame of guilds (and maybe their top players) will spread because of observer mode and events like the world championship more, I am guessing.
Maybe the devs will add an ingame gazette sometime, with pvp coverage. That would be fun. I am sure that silly players like me would be happy to write for that for free. Not that a nice salary of 3 gold per word would be bad.