The best coffee grinder for french press coffee is going to be able to produce a consistently coarse grind for all particles with the least amount of coffee dust created.
Grinders that shred coffee are particularly bad for french press coffee because during the steeping process smaller shredded particles will over extract and leave bitter flavors in your coffee. Then the smallest of particles will not be caught by the plunger and you will have mud in then bottom of your cup every time.
If you are buying a coffee grinder for french press coffee then any of the grinders presented on this page will do you well. They tend to be a bit cheaper than grinders for espresso so at least you’ve got that going for you.
Bodum Bistro Electric Burr Coffee Grinder, BlackHario Ceramic Coffee Mill SkertonKRUPS 203-42 Electric Spice and Coffee Grinder with Stainless Steel Blades, BlackHamilton Beach 80365 Custom Grind Hands-Free Coffee Grinder, PlatinumCuisinart DBM-8 Supreme Grind Automatic Burr MillHario Coffee Mill Slim Grinder, MiniCuissential Manual Coffee Grinder, Ceramic Burr, BlackPorlex JP-30 Stainless Steel Coffee GrinderCapresso 560.01 Infinity Burr Grinder, BlackKyocera Ceramic Coffee Grinder