You definitely need to clarify your question. One could have the power the inspire and enrich, or the power to destroy. Even then, the two are not mutually exclusive. And these are just two examples of types of power.

The well funded and connected lobbyist.

The individual.

Well, that’s hard to say.

First, you have to define what you mean by “power”.
Do you mean wealth?
Do you mean the ability to command loyalty from other men?
Do you mean the capacity to control what people believe?

I guess the easiest and most expected answer would be President Donald J. Trump at this current time.