TBH, it's not quite clear to me if there were an election using (Meek) STV between an excellent candidate, a good candidate, an okay candidate, a hold-my-nose candidate, a bad candidate, and an even worse candidate.
Of course, I shouldn't rank the last two, but it's not clear to me if it's advantageous to rank the hold-my-nose candidate if I fear one of the bad candidates might win.