Ok, how about this for an idea. We take it in turns to post a favourite (British spelling) comic cover every day. This went really well on the comic fan website that I used to frequent. What we tried to do was find a theme or subject and follow that, until we all got bored with that theme. I'd like to propose a theme of letters of the alphabet. So, for the remainder of October (only 5 days) and all of November, we post comic cover pictures associated with the letter "A". Then in December, we post covers pertaining to the letter "B". The association to the letter can be as tenuous as you want it to be. For example I could post a cover from "Adventure Comics" or "Amazing Spider Man". However Spider Man covers can also be posted when we're on the letter "S". Adventure Comic covers could also be posted when we're on the letter "L" if they depict the Legion of Super Heroes. So, no real hard, fast rules - in fact the cleverer the interpretation of the letter, the better, as far as I'm concerned.
And it's not written in stone that we have to post a cover every day. There may be some days when no cover gets posted. There's nothing wrong with this, it just demonstrates that we all have lives to lead.
If everyone's in agreement I'd like to kick this off with one of my favourite Action Comic covers, from January 1967. Curt Swan really excelled himself here.
Okay, I'm cheating today. This isn't a comic book cover. It's a comic style album cover of an album of covers. We had this thing by the "Pop Machine" when I was a kid. It features covers of a bunch of then-popular songs and, bizarrely, "The Lass With the Delicate Air" (1762), probably because there was no copyright on it and Julie Andrews had recorded a version of it... over a decade before the other songs on this compilation came out.
It features a Woodstock / Ken Kesey "Further" exploitation cover and a line of (mainly) people (ribbit). I don't know what happened to the one my family had, but I found a copy a few years ago and bought it.