don't get me wrong, I love the brahms, but is he really one of the romantics? sure, he lived in that time, but much of his writing style harkens back to classicism. of course, there are counter-examples, like the stormy beauty of the 3rd sonata or the 2nd piano concerto, but I would say on the whole, the brahms style is generally categorized as neo-classical.
of course, while we're splitting hairs, are we to include the late and really late romantics as well? certainly if we are I would add votes for rachmaninoff and medtner.
and are we to include my favorite pre-romantic, the incomparable ludwig van? certainly a lot of his works ushered in the romantic style, but he's a transitional figure by every account.
and what of schubert? or is he still too much in the classical vein? certainly I prefer his works on the whole to those of the much-maligned schumann, although I have a certain fondness for many of schumann's works such as the symphonic etudes and the waldszenen.