DC were the kings of US comicdom to me
I've always been disappointed in 1960s DC myself. One of the reasons I'm not a big fan of Showcase. Most of the 1960s stuff shows a slow progression from the golden age, whereas I thought Marvel swept along with a new, much more exciting broom.
DC became a lot better in the 1970s but really came to the fore in the 80s. Mind you, anyone reading Green Lantern or Flash these days? Shockingly bad.
I'm a big fan of late fifties / early sixties DCs. They had a charm and focus that's been long lost. This isn't nostalgia talking: I'm too young to have read 1950s comics and I never followed DC until Kirby rejoined them in 1970/71.
I can live without collecting most late sixties DCs, but for the early sixties: the Superman line, Green Lantern, and The Atom are my favourites. (I don't think Superman has ever been better than he was in the late fifties / early sixties, but then I think he works better as a children's character than trying to make him plausible.)
The Lee Elias Green Arrow
strips of the Fifties were also a joy to discover: a really nice confident inking style.
I don't think the DC characters would have fared too well in the Odhams comics. Sure, Smash!
had Batman anyway, but those newspaper strips were closer in style to the tv show in 1966 so we accepted it as that. But I think the rest of the DC line would have been too genteel to sit alongside the likes of Bad Penny, The Nervs, and Grimly Feendish. Wheras The Hulk and Nick Fury seemed much more appropriate.