It's not so much the pre-Silver Age material I find under-represented but foreign comics, undergrounds, indies, etc. But again, if we aren't attempting to make this the Best. Comics. Ever list, that doesn't much matter.I don't think anyone would really assert that, say, Hawkworld #s 1-14 (to cite one of my own choices) surpasses any given run of EC horror titles or "Capt. Marvel vs. The Monster Society of Evil" or the first XX issues of Action or Detective or All-Star or Captain America or whatever ... but I strongly suspect most of us (you're obviously an exception, & you know very well that I respect the hell out of your for it) aren't sufficiently grounded in pre-Silver Age or -Bronze Age stuff to intelligently address the relative heft of those earlier works. So we've gone with what we know & love, absent any real historical or critical filter.
Not completely unreasonable!