After Reflections and the introduction of alternate ring-bearers, numerous candidates became available for this technique, perhaps the most interesting being Gandalf:

Of course, with such a powerful companion as your Ring-Bearer, there must be a draw-back, and with the Solo method, the only option here is to add three burdens, so you'll need to pack

and other burden removing cards.
With so many cards to make Gandalf a beast, you're obligated to try out Solo Gandalf!