Tall is good since it commands respect, but not so tall that it's some shocking, defining feature. I'd suggest white, shoulder-length hair, since that's a length that remains androgynous and a colour that could be good or evil depending on the context. I'm not sure what to suggest as far as our apparent weight—being average without being noticably pudgy maintains the neutral form we're talking, but thin could come across as somewhat ethereal when combined with the height and may make us seem more like a God to some.