What about Shinji from Fate: Unrimited Brade Works?
Shinji probably was a full on lolcow in the Unlimited Blade Works route the most out of the other routes (he was just a cowardly cunt in the Fate route and a Horrorcow in Heaven's Feel). He pretty much did the following that would classify him as a cow in UBW:
>Tried to flirt/hit on the most popular girl in school (Rin) and kept failing at it
>Kept giggling like a psychopath out in the open for no reason
>Has massive sperg outs over being called useless or anyone putting his ego down
>Acted like he was hot shit
>Blames all of his problems on others instead of acknowledging he made mistakes
>Got trolled by
Kotomine and Gilgamesh into thinking he was given the latter as a servant so he can still fight in the war for showing "resolve" when really it was just to have a back up vessel and for their amusement
>Was bossed around by Gilgamesh while thinking he was the one in charge.
>Tried to flirt with the maids of an enemy to take him to them thinking they'd take him seriously or listen to them
>Sucked up to both Shirou and Rin to propose alliances with them then makes death threats with rejection
>Runs away like a bitch screaming after getting a poke from a spear
There's not much else to him being a cow then that except somehow he's very popular with women in his school (except for the named characters). Only other notable thing there is about him in UBW besides
turning into a grail was that after his survival, Nasu (the creator of FSN) implied that Shinji humbles out after UBW to just being a regular haughty teenager.
tl;dr Shinji is basically the DSP of Fate characters.