check out my yaoi comedy list
http://www.mangago.me/home/mangalist/7552/
maybe you`ll find one or two you didn`t kow yet...
for other not sad yaoi just look through my lists, i don`t like sad ones so you won`t find them there^^
I don't know why but I found this extremely hilarious, you should give it a try
http://www.mangago.me/read-manga/kizudarake_no_airabuyuu/
http://www.mangago.me/read-manga/nar_kiss/
http://www.mangago.me/read-manga/gochisousama/
http://www.mangago.me/read-manga/porno_superstar/
http://www.mangago.me/read-manga/ikenai_mousou_fudanshi/
http://www.mangago.me/read-manga/anata_no_tame_nara_doko_made_mo/ (totally recommend)
http://www.mangago.me/read-manga/megane_cafe_glass/ (totally recommend but it's not yaoi)
http://www.mangago.me/read-manga/razoku_no_hanayome/ (totally recommend)
http://www.mangago.me/read-manga/ichi_ni_no_san/
http://www.mangago.me/read-manga/yarichin_bitch_club/ best of the best, honestly
http://www.mangago.me/read-manga/michi_to_no_souguu/
http://www.mangago.me/read-manga/koi_made_hyakurin/
Funny Yaoi manga needed. After +600 read, I can't seem to find a really nice manga anymore :c
Comedy would be best but it's okay, as long it's not sad. Just recommend me as much awesome Yaoi as possible please.
ヾ(☆▽☆)