Overstable Throwing Putter that Works

I'm looking for a putter to compliment my OptoX Pure that is laser straight with a gentle fade right at the end. I would like to find something with overstability between an approach disc (4/3/0/3) and my straight throwing putter. My issue is I've tried lots of putters between 1 and 3 fade and most have not felt anymore overstable than my Pure. I tried a Luna, Penny Putter, AviarX3, RekoX, Logic, etc. and they were all super straight (flippy in some cases). Even my Cosmic Neutron Envy is still straight with negligibly more fade than my Pure. Has anyone had success finding a throwing putter that actually has some good finish?