Emotively you can, that is one (of actually many) thing/s in common.For me, it seems next to impossible to say who the best composer is, for the simple fact that you cannot compare, for example, the Baroque period to the Romantic period in any objective way.
Brahms's ideals weren't as entrenched in the Romantic, musical, mindset as others. His classicism in his writing sets him apart from many of his Romantic counterparts, so regardless of opinions of his greatness, is he really a great Romantic, or merely* a great composer?Brahms
However, the best can be narrowed down to a tens.best composer.
*Sounds worse than it is.