I'm working on completing the first 40 issues and some random appearances here and there for the first 2 volumes.
Have you considered Supreme's appearances in Vanguard? If so, how would you deal with Vanguard #0, which was part of Savage Dragon #2?
Put the Vanguard #0 flipbook half of SD #2 in front of Vanguard #1?
And here are a few other pre-Moore Supreme appearances I'd reccomend including, besides Vanguard #0-1:
The Supreme back-up from Youngblood vol. 1 #3 (Supreme's very first appearance)
Supreme #0 and the Supreme Annual
Supreme: Glory Days #1-2
Legend of Supreme #1-3
Shadowhawk Vol. 1 #16 and 18
Badrock and Company #6
Bloodwulf Summer Special
Glory #1 and 5
The issues of Brigade where Supreme was a member
The Extreme crossovers, like Babewatch, Supreme Apocalypse,
Maybe the Lady Supreme and Kid Supreme minis and short stories from Asylum.