Countless of manga and anime have the pervert old man comedic archetype (To Love Ru, Prison School).

But then there are these comedy series that make the pervert the main character.

Great Teacher Onizuka

Onizuka’s perversion serves to highlight his lack of qualification to be a proper teacher, but he always backs down before going too far, proving the strength of his morals.

Great Teacher Onizuka

Sora no Otoshimono

Hilarious anime about an uninhibited pervert boy who repeatedly suffers for it.

The first thing the MC does after obtaining infinite wishes is to turn himself invisible, stop the time, and so on.

Giantess fetish

Hentai Ouji to Warawanai Neko.Hentai Ouji to Warawanai Neko.

The MC in this light novel / anime / manga series gets a curse inflicted upon him that makes him blurt out aloud everything he is thinking, revealing to everyone just how big pervert he is. The heroines have different kinds of curses put on them that make them have to stick around the MC.

Hentai Ouji to Warawanai Neko: MC blurting out how great girls are in the summer.

Mangaka-san to Assistant-san to

Yuri Danshi (manga)Yuri Danshi (manga)

YuriYuri is mostly created and consumed by women, but this humoristic manga is about the sizeable number of male fans.

These series have a more unique spin on the trope:

MonogatariMonogatari

Araragi is clearly into all the girls, including the young Hachikuji Mayoi and his own sisters.

Prison SchoolPrison School

Besides the principal who plays the pervert old man trope straight, the boys kick-off the manga with their plot to get sneak pictures from the girls’ dressing room and then end up in various absurd erotic situations that slowly bring out their dormant fetishes(?).

Prison School: The male main characters uniting over their goal to not have the planned wet T-shirt contest get cancelled

Mushoku TenseiMushoku Tensei

As minor point, Rudeus has very refined taste that he inherited from his past life. Some viewers/readers find it creepy how in that “real life” he was an otaku with a thing for the underage. I didn’t even remember the whole thing until it was pointed out, and now I think it just kind of interesting.

Rudeus admiring his Roxy figurine

Baka ga Zenra de Yattekuru

The titular male character is an exhibionist that goes naked everywhere in order to inspire the MC to write.

Baka ga Zenra de Yattekuru: MC tries to put some pants on the baka.

Finally, some more serious takes on pervert male MCs:

Onanie Master Kurosawa

Besides the rather unique premise about a mastermind fapper, complete with references to Death Note and Code Geass protagonists, this manga is quite a bit more deep and touching than you might expect.

One of MC's fantasies he has while jerking off in the girls' bathroom

Yes, it really is a manga about fapping.

Tsumi to KaiTsumi to Kai

Great manga that gets pretty dark at times.

After getting caught and beaten by his dad for underskirt photography, the MC is about to get a different kind of punishment from his "girlfriend"

Nana to Kaoru

Subarashiki HibiSubarashiki Hibi

The chapter from Mamiya Takuji’s perspective is pretty dark in this regard.