• Survivor - Oliver Bradley
  Some kind of sportsman
  
  Perks
  - Marathon - Increases speed by 1/1.5/2% when chased by the killer. Also vaults 0/0/10% faster (From Rare to Ultra Rare, at level 15)
  - Wiggle - Increases wiggling speed by 5/10/15% (From uncommon to very rare, at level 10)
  - Vilgilant - Increases vaulting speed by 0/15/20%. Also automatically vaults over objects when running towards them (from common to rare, at level 5)

• Survivor - Brad Hammond
  A guy who wants to get out of here as fast as possible
  
  Perks
  - Excited - You get excited by doing ANYTHING. You are getting automatically healed by doing anything. You can't be healed by others unless you're in dying state
  - LVL 1 - repairing a full gen, opening a chest, opening a door
  - LVL 2 - repairing a full gen, opening a chest, opening a door, saving others from the hooks, healing others
  - LVL 3 - repairing a full gen, opening a chest, opening a door, saving others from the hooks, healing others, cleansing totems, sabotaging the hooks. Also grants 110% movement boost for 1s after vaulting over objects (from rare to Ultra rare, at level 15)
  - That Way - You can free yourself from the hook 15/20/25% faster with a 0/5/15% more change of doing it. Also an unnatural bond nothing/links the killer location to you for 5s/links the killer location to ALL survivos for 5s (rare to ultra rare, at level 10)
  - The Hatch - An unnatural bond links you to the hatch. After repairing 4gens / 3gens / 2gens you will se the hatch location for 5/10/15s (uncommon to very rare, at level 5))

• Killer - The mummy
  Perks
  - Catchin' - Your vaulting speed is increased by 10/15/20% (from rare to ultra rare, at level 15)
  - Hex: Storm - A unnatural storm freezes all pallets in a 12/24/36m. Every storm has a cooldown of 120/60/60s (from uncommon to very rare, at level 10)
  - Faster Than Light - Everytime he hits a survivor his speed is increased by 1/2/3% but starts 5/4/3% slower than the survivors. Also after he has 3/5/7% faster movement speed than the survivors, he will gain this boost only after downing someone (from uncommon to very rare, at level 5)
  
  Weapon - A normal weapon, like the trapper one covered in bandages
  Ability - Summons a sandstorm that hurts every survivor in it's radius (16m). A sandstorm is gained by putting a survivor in dying state.

• Killer - The Miner
  Perks
  - Doomed - Every survivor hitted by the main "weapon" is doing whatever 25/30/35% slower. This effects applies for 30/120/240s (from uncommon to ultra rare, at level 10)
  - Hex: Unheal - When the hex is active, every survivor is getting healed 75/100/125% slower (from rare to ultra rare, at level 15)
  - Slow and Steady - Every generator popped, 2/3/4 survivors have 1/2/3% slower movement speed (from uncommon to rare, at level 5)
  
  Weapon - A pickaxe
  Ability - Every survivor downed by the pickaxe cannot be healed into normal state unless they are being healed with a rare or a very rare med-kit

Hope these are good ideas, and maybe the devs will take into consideration these
As for the maps, for the mummy some kind of desert, and for the miner a cave, with cracks, so the moon offerings will work. Also the mummy is related to Brad, and the miner to Oliver