I would post this in General Gaming, but it covers various forms of media, including movies, comics/manga, cartoons/anime, etc., so I'll just post it here. I don't think it needs an explanation. 

Anyways, I'm a bit of a horn dog, so you'll have to excuse me for having a "lengthy" list.

Lara Croft (Tomb Raider)
Jill Valentine (Resident Evil) (my waifu!)
Ada Wong (Resident Evil)
Chun-Li (Street Fighter)
Poison (Final Fight/Street Fighter)
Tifa Lockhart (Final Fantasy)
Android 18 (Dragon Ball)
Samus Aran (Metroid)
Wonder Woman (DC Comics)
Catwoman (DC Comics)
Scarlet Witch (Marvel Comics)
Rogue (Marvel Comics)
Black Widow (Marvel Comics)
Nina Williams (Tekken)
Christie Monteiro (Tekken)
Morrigan Aensland (Darkstalkers)
Rachel (Ninja Gaiden/Dead or Alive)
Momiji (Ninja Gaiden/Dead or Alive)
Trish (Devil May Cry)
Quiet (Metal Gear)
2B (NieR: Automata)
Aya Brea (Parasite Eve)

Aya Brea... The OG attractive blonde in video games. She's probably my Number 1. 

To be honest, I could probably list hundreds. I did make a game waifu thread before though, and obviously I find them attractive, however that is only a short number of them all.

Nathan Drake (Uncharted 4)
Gladiolus (Final Fantasy XV)
Geralt of Rivia (The Witcher 3)
Balthier (Final Fantasy XII)

To name a few that come to mind :P

No Supreme Waifu Goddess Chie!? Blasphemy 

Nice P4 pics.

Temple Drake

God Tier Taste Ka-pi.

To OP: Too many to list all of them so i will only post the ones that come at the top of my mind.

Lara Croft

2B

Makoto Niijima

Scathach

Jeanne Alter

Velvet Crowe

I spent too long looking for this pictures for a post probably no one will see anymore... what am i doing with my life...

Took me a second to get this. But yeah same for me too. 

First and foremost:

Selphie Tilmitt (FFVIII), train train take me away far away to Trabia! I might go so far as to call myself a Selphiesexual, hey if a bunch of russian men can worship Gadget from Rescue Rangers then I should be able to start a Selphie club or something, Quistis had one (deservedly so) and so should Selphie.

If she was real then maybe she'd look like this, sadly there are very few Selphie manips out there.

And hopefully she wouldn't mind doing this occasionally (there is a decent amount of Selphie cosplay because that's the right thing to do)

Oh yeah, most other FF heroines, the wonderful ladies of DOA, most of the list at the top of the thread, plenty of others but I already covered the best.