Ok I am not a plugin maker but her goes
I have a plugin called vitals made by rod I cant find it here anymore. It only does the player and I was able to remove the image, lvl, player name and buffs and debuffs.
I also just found a plugin called vitalbars
there is also Vbar
There are a few otehrs for vitals but I did not look into them.
As to how to hide the default user vitals in the main.lua for the plugin I have Rod used
-- Disable the ingame vitals.
--Turbine.UI.Lotro.LotroUI.SetEnabled( Turbine.UI.Lotro.LotroUIElement.Vitals, false );