Years from now I think Mother Church will make Lefebvre a saint. Without him I think we would probably have lost the Latin Mass back in the 70s/80s, when in many dioceses the only choice one had was New Mass or SSPX.
Not all saints live peaceful, untroubled & uneventful lives. In fact few do. Many go against the perceived wisdom of the age. Some face approbation from the Bishops. Many suffer huge calumnies in His name.