I had to go with Northern, mainly because four of the posters are on my ignore list. Northern isn't clever enough to be a troll. He relentlessly posts FSB misinformation and bigotry. On the rare occasions he's in a non political thread he's boring. He's the kind of guy that if you met him at a tail gate you'd figure out within 30 seconds he's dull, boring, and preachy, so you start looking for any reason to walk away from him. If you last longer than 60 seconds with him you'd be hearing about his ex wife and how Neil Diamond rocks.
Goldy is just a laughable parody these days. Abby is just a cut and paste of wing nuts catch phrases. I just roll past 90 percent of his posts. There is no effort behind them.