Maybe a second stat showing if the average vote value one user puts on your comics(after having votes on 5 of yours) is greater than the average votes that user has given all comics in general(after having voted on 10 other comics), +1 point if yes, -1 point if no, 0 if it is within 1.
Example:
I vote good on 2 of big evil dan's comics, and 3 okays on 3 other comics of his, making that average (5+5+10+10+10)/5 =8, and on 10 other comics I gave 5 goods and 5 okays, making that average 7.5. Thus, he gets 0 points from me until I vote good on 2 more of his comics, giving him an average of 8.51, thus greater than 8.5, thus giving him 1 point.
That way any one registered user can only effect comics by one point, and to do so he has to vote down some other comics, and thus there could be a "most popular users" list without TOO much stripcreator politics. Since it's a popularity contest, it's based on how many people vote for you, not what they give you.
For top comics, instead of a list, you could have a "random top comic button" which shows comics with 8 or higher score randomly, removing most politics, basically allowing stripcreators to make a "playlist" of good comics.