I also nominate Tingle.

Nemesis - RE
K.K. Slider - AC
Toad - Mario
Tails - Sonic

I had more but I want to give other people a chance

*Edit* I will give me reasons:

Nemesis: He is my favorite enemy ever. Nothing more scary than being chased around by a huge monster who wants to kill you! The fact that he mumbles "stars" just makes it all the more creepy. He has a bazooka and practically nothing can stop him.

K.K. Slider: He is a chilled out, singing dog...what's not to love? He is like the cool kid of AC. 

Toad: He appears in nearly every Mario game in same way or another. He is adorable yet brave and just shows up out of nowhere. Toad always has something funny to say even though he doesn't mean to. Overall, he is just an awesome character.

Tails - He is adorable like toad, and is innocent yet always there for you. Basically the Toad of Sonic The Hedgehog. 

Samus Aran

LINK

Tifa
Sephiroth
Caius Ballad
Lightning
Cloud
Squall/Leon
Leon from RE4/RE6
Chris Redfield
Claire Redfield
Kain from Final Fantasy 4

Unfair for all the other characters.

Frank West
Kazuma Kiryu
Taiga Saejima
Nanako Dojima
Vivi

Id also like to nominate

Wheatley
Pikachu
Teddie (Persona 4)

kratos
cloud strife
sora
sephiroth
nathan drake
cole

I nominate a couple of guys I haven't seen above me:

Hades (Kid Icarus: Uprising)
HK-47 (Star Wars Games)
Pyramid Head (Silent Hill)
Mr. House (Fallout: New Vegas)
Magus (Chrono Trigger)
Neku (The World Ends With You)
Porky (Mother 3)
N (Pokemon)
Fawful (Mario)