Georges Braque (1882-1963) is famed for being the co-creator, with Pablo Picasso, of Cubism. The most detailed biography of him that I could find on the Web is here. It mentions that he destroyed much of his early, student-period work.
This is not a nice thing with respect to this series of posts about the stylistic roots of modernist painters. That is, I have yet to find any painting by the young Braque that are uninfluenced by modernism in one form or another. Nor could I find any late works suggesting serious movement to representational art.
The result of this frustration is that I have no way of telling if Braque might have been capable of painting in a realistic manner at all, let alone how well he might have done so had he persisted. In this respect, Braque might well be the earliest of many artists whose post-art school work is uniformly modernist.
For what it's worth, then, are some examples of his paintings made when in his mid-twenties.
(Stolen from Paris' Musée de l'Art Moderne in 2010.)
This version shows hints of Cézanne.