my top favorites in order

 1) non sequitur
 2) dilbert
 3) doonesbury
 4) rose is rose

after those these follow but
they are not really in any order

 5) for better or for worse
 6) fox trot
 7) garfield
 8) zits
 9) drabble
10) luann
11) sally forth
12) crabby road
13) beetle baily
14) one big happy
15) pickles

feel free to remove these two.
i never read them

 mary worth
 judge parker