Well this guy...
...could bring down Sovereign but it still required lots of outside help. In a straight fight, Luke without that help, it's hard to say.
Then again I look kind of like Luke...
...so that makes me sympathetic to his cause and thus believe in his powers, although maybe this shouldn't be factored into the equation.
--
"Mr. Paris, I assume you've had a great deal of experience being rejected by women." ~SCP~
http://img.imgcake.com/Jeffzeropngus.png