Ive weakened the grout with a handheld grout saw, then I’ve used the chisel that you have pictured along with a hammer to chisel the grout out.

Then slowly chisel the tile from multiple sides and gradually angle the chisel outward to apply force. If you use a lot of force with an outward angle to pry the tile out, you’ll take a lot of wallboard with it. You want to chisel between the tile adhesive and drywall all the way down/across the tile until it just falls off.