Yea, off the top of my head, Myung has sounded horrible on certain albums. I'm sure others have but I can't recall off the top of my head. Often the thinness and low mix makes it hard to know if they have good tone or not.
I'm noticing my list is not going to be super popular or representative. There are TONS of amazing bassists not making my list, simply because I don't listen to them much. Tons of amazing jazz, latin, funk, soul, prog, pop, etc bassists. So I hope we don't see exclusions to be indicative that we don't appreciate talent, just that there's too many amazing bassists and them being amazing doesn't mean we listen to them a ton. I have a ton of respect for Les Claypool, but he's not on my list, you know?