I do not doubt, that the half squat is the most similar variant to a VJ and I would agree for the most part with the ranking adarqui gave - yet the squat, regardless which type, is still very, very different, especially in one of the most important aspects, namely time for force production. Thinking about the squat as a VJ-specific exercise will not lead to the best results for anyone but a novice-level-strength athlete.
IMO this point led to a lot of misunderstandings between people on internet forums. What everyone observes is that an athlete makes gains in VJ once he starts to train his squat and gets better relative strength. What people deduce from this observation is that they have to squat more weight and also jump to make further gains. Legitimate regarding the observation. Then there comes a coach like Shawn Myszka and says that the squat is overrated for VJ and that squat strength does not correlate with VJ. I am sure his observation is valid as well. The problem is that both sides talk about different athletic populations, one that needs less specificity and gains ridiculously well from the squat alone and one that needs more specificity and will have a hard time to make gains from squatting and jumping without the assistance of exercises, that are indeed closer to the VJ on the similarity spectrum than ANY type of squat, for example powercleans, powersnatches, hang snatches, jump squats, depth jumps etc.
I agree with adarqui in so far, that people will make considerable gains with a half squat in the beginning. bball2020's argument falls in the same category and might be correct if every trainee stays as unadapted as they are in the beginning. But that is not the case. Sometimes even with less than optimal programming people actually get somewhat strong by accident and from this point onwards they will have little benefit from doing half squats alone. What they need is the type of squat that produces the strongest person the fastest regardless of how similar that squatting movement is to the sport demands. Because other exercises will have to be used anyway to transfer higher strength to higher VJ. At this point it is irrelevant how closely your squat "mimics" a jump, a concept that is totally backwards in the first place, and it becomes a lot more important how well your squat prepares you for things you better do to become a better athlete, like doing snatches. Then you are at the point were Shawn Myszka was when he said that squats are an overrated exercise for VJ - an argument that I don't share, but that is understandable regarding his perspective working with a lot of preselected athletes, that have a certain level of strength already and that validates my thoughts that a half squat is not the final answer to VJ training and that training this way is short sighted because it won't make you as strong as fast and not optimally prepare you for other things that will need to be done once you gained some strength - for example unilaterals.