Re: Lightnings vs Scots vs Snark vs Sunfish
You risk being in the water with any small boat including every boat on your list. it would take a jerk LEO to cite you for being in the water to right a boat.
That said, the fastest small boat you can buy would be a cat. The Hobie 14 is a single handed boat. The Hobie 14 turbo adds a jib and is still a single handed boat. Both versions can handle extra crew members.