whose really the troll king????

[Shadow Phantasm]

Obito is the ultimate troll since he fooled everyone who thought he wasn't Tobi.

 

[Trollasaur]

Obito hands down.

 

[Crossroads]

Itachi, no one saw him being a hero of the Leaf coming.
Oro is second, i've seen theories of him still being alive before Sasuke brought him back. A few were pretty accurate.

 

[Skull Knight]

Troll King:Orochimaru
Troll Queen:Tsunade