A shame that they don't fit you.
The Raleigh, being a 56cm, will easily sell. Give it a quick clean, take some decent photos and put it on the Road Bikes For Sale section on here. You will need a price in the advert, no idea how much it's worth. I'd leave the saddle as it is, any buyer of the bike will probably put one of their own choice on if they are going to ride it.
The Orbit Gold Medal is really nice, should sell easily, maybe a slightly slower sale as it's 52cm. No idea about the Helium but most things seem to sell eventually.
How did you happen to have these in the shed?