There's an excellent 4CD box on JSP that has all of the recordings by Sam Morgan's band, A. J. Piron, Doc Cooke, the first Kid Orys etc. From a 'dixieland' point of view you wouldn't want to miss the Bob Crosby/Matty Matlock/Eddie Miller/Yank Lawson/Irving Fazola- evoling into the Rampart Street Paraders strand, including albums by the Lawson-Haggart Band - and collections under the names of both Wingy Manone and Red McKenzie carry many delights. Someone mentioned the Muggsy Spanier Ragtimers - to me they are absolutely seminal - maybe because I grew up with them!