I my youth (before I discovered Bird!!) I was very keen on New Orleans jazz of the 1920s and had the sort of modest collection of 12" LPs that people's budgets ran to in those days. It was your first three listed items - the Oliver, Armstong and Morton - but I also had a great album of tracks under the leadership of Kid Ory by the New Orleans Wanderers and New Orleans Bootblacks which inclued IIRC George Mitchell and Johnny Dodds and was very well recorded for the time. Perhaps someone could advise on where these tracks are now available?
Staying with Ory, does your remit include the New Orleans revival of the 1940s? If so, I can recommend his Creole band, especially these albums: