if the question is primarily about MFwide zooms and not constrained by back focus distance, the Leitz 21-35 should qualify, it also is reasonably good.-
Its rear element retaing ring is a bil too long to clear a Canon 5DII mirror, but some careful filing of the bil that the mirror hits solves the problem-The Leicaflexes and successors had long flange distances and peculiar mirror mechanics- (a rear mount lens- cutout is just like the kilfitt wide macro which also has a sloping bit to avoid the mirror (at least my made in Liechtenstein, Alpa-mount copy)
p.