Richmond, Colby, Grinnell, Oberlin and Colorado are probably the only schools on your list which would not have a “competitive” environment for neuroscience. Others may have a different point of view, but the vast majority of colleges on your list admit very strong and academically oriented students who are not particularly laid back once they get to college. These five have a reputation for being a bit more relaxed (not that there aren’t strong and competitive students there, but that the vibe is more chill).
The others? Not so much.