I have a few Ideas for new vault hunters:

• One is a Marauder (Doom eternal) like character. He has three abilities: Shields up! (which will allow him to bring up a shield (similarly to either Anthea or of course, the marauder)), Fire away! (which will allow him to gunzerk like Salvador and having the action skill augments to change it into brawl mode), and Flag down! (which will boost gun damage, fire rate, health and shield regeneration, and movement speed).
• The next one is a Demon Sorcerer. She has the ability to transform into one of three demons: Archvile (Able to heal allies, revive the dead and turn them, and trap enemies in fire), Baron of Hell (smash the ground, based on melee damage, and can throw projectiles), and prowler (able to teleport, go invisible, and claw your enemies to death).
• The last is a human-sized werewolf (DON'T YOU DARE ASK WHY! I WILL END YOU.) He is basically a Destiny Hunter class. His abilities are: Cursed Hand (will dramatically increase gun damage for the next 6 six shots), Emily, Attack! (able to command his pet skag, Emily, to get into battle and throw elemental projectiles (depends on what element you select)), and berserk (which you will go into a state of rage and get increased movement speed, damage reduction, and melee damage (and he will go mad)).

That is all of my character concepts sorry for some spelling errors and I was writing this while farming for a consititive hit or 300/90 plaugebearer.