Black blocks in Minecraft

What's the best thing to use for black blocks? He's a list of black colored blocks that could be used in decoration.

Black Wool
Obsidian
Black Stained Glass
Black Hardened Clay
Black Stained Glass Pane
Black Carpet
Block of Coal
Black Shulker Box
Black Dye
Black Glazed Terracotta
Black Concrete
Black Concrete Powder
Black Bed