I knew a photographer who used to use a 90mm on a Speed Graphic as a macro frequently. He was very pleased with his results in general - I don't recall which 90mm he was using in particular, though.
If you want a great macro lens for 4x5, the Nikon Apo-Macro 120mm is about as good as it gets. At macro range, it covers 5x7. It also will do at least 2:1 macro (2x lifesize), maybe more. Getting beyond 2:1 macro with large format is probably a bad idea given how shallow the depth of field is at that range - it will be almost impossible to focus correctly.