Please don't call me out on any of these it's just my opinion and feel free to copy and paste your own ideas in the comments

Cosmic:
1. Captain Marvel (Movie)
2. Hyperion
3. Corvus Glaive
4. Medusa
5. Cull Obsidian
Skill
1. Aegon
2. Blade
3. Nick Fury
4. Spider-Man stealth
5. Gwenpool
Mystic
1. Doc Doom
2. Sym Supreme
3. Claire Voyant
4. Magik
5. Ghost Rider
Tech
1. Ghost
2. Sparky
3. Guilly 2099
4. Warlock
5. Sentinel, Doc Oc or Darkhawk
Science
1. Quake
2. CAIW
3. Void
4. Human Torch
5. Thing
Mutant
1. Domino
2. Omega Red
3. Namor
4. Sunspot
5. Havok or archangel