Tree trimmer, for example

• One who might deck you
• One who decorates
• Beautifier
• Decorator
• Drapery, e.g
• One ornamenting
• One who decks the halls, say

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Adorner \A*dorn"er\, n. He who, or that which, adorns; a beautifier.

Wiktionary Word definitions in Wiktionary
n. One who places adornments, who adorns.