Will-O'-The-Wisp
6 1 4 7
Loner, Stunty, Titchy, Block, Dodge, Hypnotic Gaze, No Hands, Regeneration
Cost to hire: 150k
=> the model is a spectral shade/wraith. The player would be a mist/ethereal (hence the block/dodge/stunty/titchy/ST1/no hands combo) and, true to its name, would hypnotise players. Regen because it's an Undead creature and to compensate for the total lack of ball handling. He should be good at disrupting cages and giving assists but not much else.
Serval Martense
6 3 3 7
Loner, Bloodlust, Frenzy, Juggernaut, Claws, Mighty Blow
Cost to hire: 150k
=> an old-school d&d Wight, he does look like a bloodthirsty lunatic. Can be a liability but desperate times... Too expensive? Give him MA7 instead?
Tamaëlla Hawkwind
6 3 4 7
Loner, Bonehead, Secret Weapon, Accurate, Strong Arm, Hail Mary Pass, Disturbing Presence, Safe Throw
Cost to hire: 150k
=> a greebo Sylvania line elf holding a hawk. The idea for this one is of a falconer/thrower who, instead of throwing the ball, has it flown to target by the bird. Accurate and strong arm for the bird's accuracy at delivering the ball; Hail Mary for the difficulty of controlling the bird for distances greater than long bomb; safe throw because, well, how do you intercept a bird?; sometimes the bird gets temperamental hence the bone-head; the hawk can disturb passes, catches and interceptions; taking a hawk to the pitch may not be a chainsaw but it's still against the rules and considered a secret weapon.
"Oi! That's no Troll!"
4 4 1 8
Loner, Decay, Dirty Player, Piling On, Regeneration
Cost to hire: 180k
=> you know the willy miniatures goblin & skaven with a troll mask? Decay because it's 2 idiots pretending to be a big guy; dirty player because one of them is a goblin; piling on "because" and Regen because, if one of the idiots gets seriously wounded, there's always an another idiot in the audience to "take up the mantle.
Note that my idea with these is that they can be used by any team and I am mostly interested in player cost evaluations.

Model discussion in this thread
EDIT: changed points cost and name of "fake troll" to Turncoat Troll