Maybe Howard wasn't included because Bobby was more blatant?
If Skeeter is on that list for the reason she likes sports ... I submit Cotterpin (who certainly doesn't seem to have romantic feelings for anyone and really isn't into Doozer stuff much at all) could be on the list too. I'd believe Cotterpin over Mokey, anyway. I've certainly had that thought crossing my mind when I write her in my fics.
Junior Gorg also kinda strikes me as someone who'd at least think about it. His dream girlfriend was just him in drag, LOL.
While I agree with Link, I also agree with some of the commenters about Fozzie being a more obvious choice. While Link at least tried to look like girls' eye-candy, Fozzie ... I don't think I've ever seen him be attracted to any female. I remember him being embarrassed with what's-her-name kissed him on TMS, but he seems kinda creeped out if girls dote on him, even Beth from MTM.
I still find weird and amusing that the list-maker would resort to their whatnot and some photoshop thing over actual gay Muppets, like Bobby and Samson. I mean, there was no rumor at all with them, they were completely open ... AND THEY DON'T GET NUMBER ONE?
One should have been Bobby and Samson. Two should have been Bunsen and BEAKER (these people should spell it right, dang it), who have more shipping hints with them than Bert and Ernie have had their entire careers.