In the end, the word that say 'comedy is subjective' is always proven true no matter the circumstance. Anyway, one of the arguably strong example of Comedy VN would be Ren'ai Royale which coincidentally another VN from Sankaku Ren'ai (Sukiren) developer. For Royale itself, the staff put more focus on the jokes for the four main heroines while stacking the romance element on one side heroine, resulting some of the player declare the side route is the best simply it because has romance development more than the four main heroines. While it may caught off-guard some who expect usual romance from the Royale, once again the 'comedy is subjective' is still apply because Royale humor may be not the best even if one approach the VN with comedy in mind.
There's also Yuzusoft VN in which while it not really full comedy VN, it still has the element 'comedy fatigue' across all of their VNs, with the joke is usually calling the MC virgin. Granted, the staff may have their own comedy taste with them indirectly calling out the player who play Yuzusoft VNs as virgin which may be work if the player took it as self-depreciating joke instead of being offended by it, but regardless the joke can still be quite tiresome, especially if one is not fond of the that kind of comedy in the first place (Moreso if someone has brilliant idea to play all translated Yuzusoft VNs (Up to 8 if Tenshi Re-Boot released later) in one sitting).
I guess that's all for what I can say about comedy VNs here, and by the way so far I didn't recall the comedy VN similar to Lamunation (Although there's Gintama and 100 Girlfriends if one want anime example).