Luck potion: Gives you luck so you are lucky Honeycomb Block: Decor for if you want to build something honey-related Large fern: also decor Glow lichen: Ambience to the caves and underwater, also a light source Endermite: Make an enderman farm.
Silverfish: Put a bunch in your friends house and they die (If you want to get revenge) Copper: You just said it yourself: Use it to craft copper blocks, which can be used for decoration Bell: Ring it to get villagers in house, or highlight nearby mobs in a raid.
