Pellia liverwort, Monosolenium tenerum
Pelia does well in a variety of different areas of the tank, whether you want it as a foreground or background plant. Though not an actual moss but a liverwort (similar to Riccia), it is very easy to attach to hardscapes.
You can create a bonsai tree by wrapping it around spiderwood or create some nice natural looking landscape by wrapping it around some Iwagumi style stones!
Comes in a cup with 1 ounce of moss, plenty for you to design with!