I agree about the Gruenwald Nighthawk being ahead of the 616 Kyke and I said so. He's Captain America level where he's from. We don't see it on panel, but I think in handbooks they flat out say he's the second most effective hero on the planet aside from Hyperion, which says something from a guy with no powers.
But the JMS Kyle... not so much. He mostly on a street level prior to Secret Wars. There were exceptions to that, but that was his niche. Again, post Secret Wars he did step into the big leagues... but they pretty much sucked. Yeah, you can say it's not hard to save the world with Hulk, Dr. Strange and Silver Surfer. But in theory it shouldn't be that hard with a Superman, Wonder Woman, and Green Lantern analogue either... problem being again they sucked. You can say they had the potential to do more had they not be cancelled, but potential and a dollar won't buy you a cup of coffee.