Have you tried Rainbow Chat? You don't need to assign colors to the text if you don't want, you can just use it to create a quickslot bar with shortcuts output to what ever channel you assign. There is a checkbox to "Use Default Color" which suppresses creation of the color tags.
There are a few limitations, such as there is only one bar and it is only displayed vertically. There isn't a specific limit to the number of quickslots you can create, and you can drag the generated shortcut out of the Rainbow Chat bar to any other quickslot if you want.
If you find yourself repetitively using a response to emotes or chat, try LoTRO Alerts - there is a quickslot option that you can assign which will allow you to do things like quickly responding to "Wave" emotes.