See here for the current Compendium of Epic Armageddon army lists as developed and tested by the Tactical Command community. I tried adding it as an attachment but the file is larger than the forum allows. If you notice any errors please report them in this thread here.
Also, there's a good online Epic Armageddon army builder to be found here.
Historical note: I previously had several posts worth, each with many attachments, one for each army list. Thankfully now there's an up-to-date compilation of them all, which is much better, as I started the thread with good intentions, but never got round to updating the previous individual lists.