Dale, My metal of choice is platinum because it is a good white
colour, is tough and malleable, and has the best resistance to
abrasion. The downside is the expense and the need for different
tools and equipment to work it.
Next is 18ct paladium white gold. This comes in different varieties
and my choice is the ‘general purpose’ variety because it is tough
and malleable, but it has a grey tint in the colour. The casting
variety appears to have a bronze tint and is more brittle/less
malleable. Either way Rhodium plating takes care of the colour, but
that in itself is a compromise.
Nickel white gold has a good white colour as far as I have seen (I
never use it myself but have done repairs on it), and it has the
problems you describe.