The complete rags of Scott Joplin, James Scott and Joseph Lamb are all readily available in various editions now. However, a huge amount of excellent ragtime has been written over the last thirty years. I suggest David Thomas Roberts, Frank French, Hal Isbitz and Reginald Robinson for you to explore. Scores and recordings are on the internet in various places, including the websites of the composers.
It is not exactly ragtime, but you might also like to study the complete transcriptions of Morton's solos by Dapogny, published by the Library of Congress. Just about all the big stride solos of Waller, Johnson and others have now been accurately transcribed by several people, among whom John Farrell was particularly outstanding.
Contemporary ragtime, Morton and stride transcriptions, and indeed many of the Scott rags, require a pretty advanced technique compared to that needed for Joplin's works.