looks at Mordekaiser
sorry metal prince, guess you are not really fit in :c
I think Lee would be the right character: it needs to be one that can do a great pool of phisical moves (A button) and has a great variety of skills so he has no problems about choosing his skills. His B standard should be the Dragon' s Rage (R, not kiddin. using it as a final smash would result in something reeeeeally banal) as melee hit with a great pushback, B+sides should be Resonating Strike (Q reactivation, that also resembles Safeguard ) in a way he becomes invincible mid-dash ( maybe make is a counter skill instead?) , B+down Tempest(E) as a short-charge attach from above that pushes down and B+Up... ward throw
so with an other activation he dashes at his point :D
For the final smash i would not use Dragon' s Rage because i think it is banal, so maybe something that reflects LoL, Ionia, his past as a summoner or some uberpowered version of his skills.
What if... he summons a big Siege Minion OR BARON NASHOR in his position that shhots cannonballs in the direction of his nearest/attacking enemy? :D