The question with these headers is never whether it looks good.
The question nobody seems to ask is whether it is a business effective header. what's the best thing to put in a header? In other words, what could you have put there....
.....Picture of the author?
.....Picture of a customer giving a testimonial?
Most people fixate on the look of headers on purely aesthetic terms. That's not the point because
your website doesn't need to be pretty to be business effective. And a number of tests indicate the standard way of looking at what's pretty almost guarantees you're hurting response in some way.
Unfortunately, that's why many direct response copywriters come out against "pretty." That's not the right way to look at it, but nobody bothers to A/B split run header graphics or test them in the same way copy gets tested.
Everything on the site should be open for testing. Nothing gets a free pass from scrutiny just because someone thinks it looks nice. Nothing is free, you're buying that graphic with the more effective use of that space you could be getting by rigorously testing 1) a plain page 2) other graphics.