Well, if Alric is the Leveler then he did a pretty good job at eliminating anyone strong enough to stop him...
Personally though whay I believe is that Alric was a hero and Balor was the Leveler. No where in any Myth text have i seen that the Leveler or the hero of the age for that matter have to hang around the whole thousand years... So technically they could be killed early on and still leave a wake of destruction in their death. From what Gurps says it almost sounds like a hero and a Leveler arise around the same time and then duke it out, and no matter who wins the age is still light or dark, like its supposed to be according to the cycle...
-neomorpheous-