A brief Wikipedia entry on Vaszary in English is here. The Hungarian language entry is here, and has more detail though the computer translation to English can be hard to follow. This site includes many tiny images of Vaszary's works that can be enlarged somewhat.
My take on him is that he was very talented, but let modernist ideas get the best of him after he turned 40. The later works are both simple and sketchily done, and so aren't very interesting. In a caption below I mention the paintings I liked best.
The first self-portrait was made when he was about 20 years old. I have no date for the second one, but I'll guess that he was in his 40s when this was painted.
Basically traditional in style, though the brushwork is fairly free.
Some reproductions of this have a more golden coloring. This shows that Vaszary was perfectly capable of painting in the academic style.
Even before painting Golden Age and his uncle, Vaszary was experimenting with modernist ideas.
This seems more like an illustration than a fine-art painting.
These two paintings exhibit strong brushwork. I find them the most interesting of the images posted here.
Kees van Dongen was an influence for a while.
La Cigale was a Paris night spot that Vaszary must have frequented while in town.
Another trace of van Dongen here.
I think the right arm isn't drawn correctly; in any case, it looks odd. Here Vaszary was drifting in a representational direction. I don't have a name for the subject, so cannot guess whether or not she wanted to be depicted mostly naturalistically or if the style was Vaszary's choice.