If you want the larger images or to match the names and faces easier, link.

Character descriptions from Netflix:

Robert Englund aka Victor Creel is a disturbed and intimidating man who is imprisoned in a psychiatric hospital for a gruesome murder in the 1950s.

Eduardo Franco aka Argyle is Jonathan’s new BFF and a fun-loving stoner who proudly delivers delicious pizza pies for Surfer Boy Pizza.

Jamie Campbell Bower aka Peter Ballard is a caring man who works as an orderly at a psychiatric hospital. Tired of the brutality he witnesses day after day, will Peter finally take a stand?

Sherman Augustus aka Lt. Colonel Sullivan is an intelligent, no-nonsense man who believes he knows how to stop the evil in Hawkins once and for all.

Mason Dye aka Jason Carver is a handsome, rich athlete who is dating the most popular girl in school. But as a new evil threatens Hawkins, his perfect world begins to unravel.

Tom Wlaschiha aka Dmitri is a smart and charming Russian prison guard. But can he be trusted?

Nikola Djuricko aka Yuri is a seedy and unpredictable Russian smuggler who loves bad jokes, cold hard cash, and crunchy style peanut butter.

Joseph Quinn aka Eddie Munson is the head of the Hawkins High official D&D Club, The Hellfire Club.

UPDATE:
Amybeth McNulty aka Vickie is a cool, fast talking band nerd who catches the eye of one of our beloved heroes.

Myles Truitt aka Patrick is a Hawkins basketball star who has friends, talent, and a good life…until shocking events send his life spiraling out of control.

Regina Ting Chen aka Ms. Kelly is a popular guidance counselor who cares deeply for her students — especially those struggling the most.

Grace Van Dien aka Chrissy is Hawkins’ High lead cheerleader and the most popular girl in school. But beneath the seemingly perfect surface lies a dark secret.

Actor-wise, I'd definitely go Wlaschiha, but as far as the characters... Jonathan has a stoner friend, and I need to meet him. XD

I was gonna choose Wlaschiha, because he's the one I like the most on that list. Also Englund. But then I read the character description and that one sounds like a lot of fun.

Are we getting a list of new girls too? I'm not strictly opposed to sausage sizzles, but please also cater for your local vagitarians.

Updated with the 4 newbies announced during Geeked Week in June 2021, whose upside-down pictures don't bother me *twitch* at all.

(LOOK MISSY, MORE GIRLS!)