Yeah that is my bad for spelling his name wrong in the thread title. I didn't mean to implicate that they were exactly alike but having watched all of Torchwood recently and the "Outrageous Okona" last night the similarities that I pointed out in my original post I thought that he had some of Jack's characteristics.
In terms of character they are slightly similar. But to really be the TNG equivalent of Jack, you'd have to have a minor character who proved immensely popular, went on to have a starring role in a darker more mature spin-off and be able to die repeatedly with no real ill effects.
In other words, TNG's Jack Harkness isnt Captain Okona. It's Miles O'Brien.