[hasbroherofan]

There are a lot of prominent to prominent-ish characters who have still never been made. Off the top of my head.

A lot of recent or recentish creations:

- Ironheart
- Amadeus Cho
- Miss America
- Wasp (Nadia)
- Mr. Negative
- Honey Badger
- Viv Vision
- Moon Girl and Devil Dinosaur
- Quake
-The rest of the Runaways
- ANY of the New X-Men other than X-23 (Pixie, Surge, Prodigy, Dust, Hellion, Elixir, Mercury, Anole, Rockslide, ect.)
- Morlun

And a crap ton of older and classic characters to boot.

- Lockjaw
- Any of the Generation X kids other than Jubilee (M, Synch, Chamber, Skin, Husk and Mondo)
- Human Torch (Jim Hammond)
- Aunt May
- Legion
- The Wizard
- Avalanche
- The High Evolutionary
- Mr. Hyde
- Crystal
- Karnak
- Gorgon
- Mastermind
- Graviton
- Atlas
- Mimic
- Phyla-Vell
- Moondragon
- Quasar
- Molecule Man
- The Controller
- Jarvis
- Wyatt Wingfoot
- Trapster
- Swordsman
- Count Nefaria
- The Warriors 3 and Balder the Brave
- Surtur
- Cypher
- Magma
- Moira MacTaggert
- Rictor
- Siryn
- Speedball
- Justice
- Titania
- Feral
- Sage
- Exodus
- The Supreme Intelligence
- Rick Jones
- Firebird
- Any of the Starjammers

And those are just ones that spring to mind. And not even getting into characters who have been made in the MCU but not comic form (Mantis, Baron Mordo, likely the Eternals soon) or ones who were made by ToyBiz and badly need updates (Toad and the Young Avengers).

Hasbro has done an amazing job filling out the Marvel Universe, but in many ways they've still barely scratched the surface.