The TextEditor for one, use a default 14.0f font size (set in the constructor).
I can set the font by myself with a setFont call, but I would prefer not having to do so for all the text editor I’m using.
TextButton use default 15.0f font height (in getFont()), and it’s not possible to increase this.
Label use a default 15.0f font height (in the constructor)
The combobox use label, hence a 15.0f font but also use the LookAndFeel::comboBoxFont…
Probably adding a LookAndFeel::getDefaultFontHeight() or a Font::getDefaultFontHeight() could be a good idea there.