Maybe he really is one ... I am embarrassed that artnet has two names. And pictures of different open. Although, maybe it's the way it should ...
http://www.artnet.com/Artists/Artist...aspx?alpha=G40
And as "mediocre" - that I did not invent, but read here
http://epublishingcorp.com/articlesRaichel/Pre-20thcenturyArt /MENGS.html True, there is in English.