I have a soft spot for Eye of the Serpent, but it's more obscure than the others, and was originally written as a single player vs DM adventure. It does work well as a starter though, with a clear objective and only a few ways forward at the beginning.I voted for the Sinister Secret of Salt Marsh.
I also enjoy UK 5: Eye of the Serpent as an alternative to starting players off in a tavern. The module has some problems, but it's a nice springboard.
Never heard of this one. Details please?