Who was actually the ruler in Lion King? Mufasa? Simba? Scar? Monkey?

[Ucy]

I think it was the Monkey. Imagine what will happen to the kingdom if the monkey was killed.

I don't exactly remember his role in the movie, I guess he's a seer or some sort of a "prophet". . He normally live in isolation but knows what's going on in the kingdom. (*I however don't think the movie should be seen as source of Truth nor be believed, because the "system" would normally copy the truth of GOD side and pervert it.)

Every wise King actually keeps a True/Holy Prophet or GOD's True servant to guide him, and the prophet is obeyed as long as it's the CREATOR speaking through him.  

[MNbag]

It was Pumba.

Pumba is behind the murder of Mufasa and Scar.

Pumba sees all.

[NastyGambler]

It was Pumba.

Pumba is behind the murder of Mufasa and Scar.

Pumba sees all.

I support your statement. Pumba has the sneaky look

[Iron Fist]

It was Pumba.

I think it's Timon. Timon is a smart one. He often influences Pumba's actions. He is a mastermind, and Pumba is just an executor.