for BL, Luckydog1 was so funny and i honestly didn't really expect it to be going into it and then for otomes i thought Cupid Parasite was really comedic
Taisho x Alice, definitely! I always laugh at Yurika's antics and her silly dynamics with the others. One of the routes I enjoyed the most was Red Riding Hood's. He's so cute when he's being teased >u<
Seconding Omega Vampire. There's a weird mix of intentional comedy writing and unintentionally hilarious plot points. Some of the funniest stuff I've read in a long time
omg I forgot about omega vampire since I played it in Japanese and it's my fourth language (so sometimes the game doesn't fix itself in my head directly for some reason) and it's so good, I find Keiichi so funny alongside Hakurou, both together is laugh guaranteed, specially during those school scenes, I had a blast. I love how the game mix more lighthearted moments in some routes and others are way more serious.
Alice in the Country of Hearts. The attitude and reaction of Alice to the male leaders make me laugh a lot, though the background of the story is very serious.