You can include just about every '50s Academy picture (at least U.S. releases), cause they were all matted to 1.85:1 in theaters. Then there's Invasion of the Body Snatchers, which was filmed in Academy, but was blown up to the SuperScope 2:1 ratio for theatrical release, and 16mm prints with more visual information on the top and bottom, but less on the sides exist. This Island Earth is another example of the process.
I've done a 1.85:1 version of Gigantis, the Fire Monster myself.