I went with Centennial. It's somewhere between Columbus and Cascade. Pretty high alpha so it can be a good bittering hop, but it has great aroma and flavor character too.
I can see why everyone says Cascade, since it's the most oft-used aroma/flavor hop, but I'd have to add to much for bittering. I like a bitter bite in my beers, and usuall use Cascade.
Fuggle would be a good choice for a more polite English ale that isn't too bitter.
Oh don't give me none more of that Old Janx Spirit
No, don't you give me none more of that Old Janx Spirit
For my head will fly, my tongue will lie, my eyes will fry and I may die
Won't you pour me one more of that sinful Old Janx Spirit