Did some research, not too keen on the composers that came from the same era as the painting. Josquin Des Prez and the Franco-Flemish School etc. Even though these pieces depict the Divine Comedy rather than Bosch's painting, I think for now it's a toss up between these two. Tchaikovsky's 'Francesa da Rimini' and Liszt's 'Dante Symphony'. Leaning towards Tchaikovsky personally!