The L-1 is very easy through a large multinational company after a year of employment with that company outside the U.S. and is attainable although more difficult through a small multinational company. The other options are the E-2 (treaty investor visa), which could allow you to work for a British-owned company in the U.S., or the O-1 (extraordinary ability visa), which requires a relatively high level of achievement but is often attainable by talented professionals.