NU also has been making a big push in chemistry / materials as well as physics lately. The same with economics. Some big recent hires are below:
http://www.northwestern.edu/newscenter/stories/2015/11/physicist-gerald-gabrielse-to-join-northwestern-.html
http://www.northwestern.edu/newscenter/stories/2015/08/bioelectronics-pioneer-john-rogers.html
http://www.northwestern.edu/newscenter/stories/2016/01/dichtel-joins-northwestern.html