I don't think you ask too much at all
... coming up with ideas is fun, even if they may not immediately match the picture of what someone is looking for in their mind's eye.
So, to help narrow down what shades of gold might be in range, to ask what bud count and branching you had with Mary's Gold, to find out how tall is "tall" and how large is "large" to you (the same as MG or more than MG or?), here is a sampling of similarly sized cultivars. One is nocturnal, and all but one are dormants like Mary's Gold ...
If you are looking for height/size similar to Mary's Gold (pictured first, for color and form comparisons)... here are some that were reported as having some resistance to rust:
