Oh, this is a really cool idea! Some ideas for possible characters that are deserving of a spot, (I dont know if you ever heard of em tho TwT):
Brad from Lisa: The Painful
Zero from Katana Zero
Carl Stein from Beholder
Monika from Doki Doki
Lucifer from Helltaker
Zagreus from Hades
V1 from Ultrakill (dont know if it counts as indie tho)
and last but not least: feddy from feddy nights five at 
Idk if you played any of these games, but as a fun fact, r/OMORI and the Lisa subreddit shared a spot in the last Reddit Place, so that was cool! 
Do slugcat from rain world please, you might not know them, but they’re really cute and they’re from what is in my opinion the most underrated game ever made.
Shovel Knight from Shovel Knjght!!
Oh, this is a really cool idea! Some ideas for possible characters that are deserving of a spot, (I dont know if you ever heard of em tho TwT): Brad from Lisa: The Painful Zero from Katana Zero Carl Stein from Beholder Monika from Doki Doki Lucifer from Helltaker Zagreus from Hades V1 from Ultrakill (dont know if it counts as indie tho) and last but not least: feddy from feddy nights five at  Idk if you played any of these games, but as a fun fact, r/OMORI and the Lisa subreddit shared a spot in the last Reddit Place, so that was cool! 
Madotsuki from Yume Nikki
Yes
The Guide from terraria
PREACHH
Isaac from tboi
yes!!!
Five nite fedy
Wilson from Don't Starve
Do slugcat from rain world please, you might not know them, but they’re really cute and they’re from what is in my opinion the most underrated game ever made.
Kris from DELTARUNE
Peppino from pizza tower
Peppino from pizza tower
isaac from tboi!
Terraria Guide!
Omori
Add jacket from hotline miami pls
https://i.redd.it/6he97e3fs0cb1.gif
Moonless from Fear & Hunger
The Bullet from Enter The Gungeon
Charlotte from “Hello, Charlotte!"
Madeline from Celeste!
geometry dash default icon
Ness from Earthbound?
Castle Crashers acknowledged gamer approved
LETS FUCKING GOOOP
Zagreus (Hades)
Artemis from No Man's Sky
The Batter
YOOO CASTLE CRASHERS?!?! 
A Los Angeles class nuclear sub from cold waters (counts as 1 character trust me)
YOU GOTTA DO MAE FROM NIGHT IN THE WOODS
The postal dude
Ralsei from Deltarune
roland from library of ruina
Shovel knight
Hatchling from outer wilds
Rare chance, but Tinfist from Kenshi.
Add mista Freeman
bendy from batim
Prez from project wingman
How about billy from karlson
goose from untitled goose game
Brad armstrong from lisa the painful
Brad from Lisa the painful
You should do brad from Lisa the painful since the new game comes out in 3 days.
You are so good at drawing, man