I don't agree at all that if a Killer has a fan base it means he isn't lurking into the darkness well enough. These lists are pure bias. People who are famous to me, may not be to another. With the fact that I have been around the BC almost my entire SL, a large number of people "famous" to me would be BC because this is my exposure.
Xaz, hell yeah. He is like the godfather. I would/will always see him as such. He, from my perspective, is one of the most influential members of the case in SL.
Anarch, who I have only even met twice. He is the "Cheers" of SL gor. Everyone knows his name.
Kaiila Mahoney, again, I have only met her once and through a killer. She is like the OG of the GC. You want to know anything, need anything GC; want someone to save your life! This is the momma bear who can fix you up no matter what happen to ya

again, I would probably add a few more killers but this is because it is my background and these are the OLD SCHOOL players who still rock at what they do! Vince is still around, Johnn. -To me- they are famous, though to someone else they might be like "who the hell is that o_O"
The circles you are exposed or limited to immediately effect any choice made in this situation.
Carter Cabbages (Ebbage), Mrs. Heaven, Asea, Nita, NettlePie - by word of mouth I know these also to be very well known players.
So at the most....from my perspective I can offer about 10 xD