The 1" triple and .750 double seem to work well for the cost and durability, need 3/8s collet.
https://www.buschmachinetool.com/milling-cutters
Now that you mention it…those dovetail cutters could come in handy for fixturing purposes.
I have reached out to the owner in the past to make a custom batch of 1/2 single insert 3/8 shank but it’s a decent investment.