Hello, Alyssia. I also really like #6. What is your niche? Is it typing/transcription? Because "Let my fingers do the typing" is catchy for a transcription based business.
Something along the lines of the northern lights is a very good idea too.
Just a little note -- take your time with coming up with your tag line. You'll soon discover that one will pop into your head, and you'll be so excited! Don't rush your decisions. I'm a believer that these first few steps in starting your business are great ones -- just like the northern lights