Hickory is HARD, but can be cut with patients and good blades. I use the FD-PSR1 #1 Penguin Silver Rev. It is .030w .011t 20tpi(8 rev). Remember to go slow and put package tape over your pattern. The blades tend to burn the corners if you don't.
I cut Names for Wedding gifts and anniversaries and welcome signs. I haven't had any problem with the letters breaking off the finished pieces. I use Danish oil to finish them. I'd say I get about 1/2 hr. out of the blade before I have to change it. My pieces usually take about an hr. to cut. I use 3/4". Watch out for drill bit travel, small bits will follow the grain.