I would also vote for Rose and Crown because even if you don't get a table that has a good view you can go down to the viewing area that is reserved for R&C patrons. We watched IllumiNations from there last December and the view was great. I'd aim for a 7:45 or later reservation so that you're at dessert by the the IllumiNations starts.
Also just to note, all of the restaurants around WS are one credit per person except Le Cellier (which becomes a Signature on starting 3/1 and does not have a view of IllumiNations). Bistro, which may have a few tables with a view, does not accept the dining plan.