crops for raised beds

I garden on a heavy clay/chalk soil so this year I am constucting raised beds.  Runner and French beans are quite successful so I will continue to grow these in open ground.  However, I would appreciate advice on the best varieties of veg to grow in a raised bed system.
Frecks

Can't think of anything that would not be suitable except for butternut squash, they grow like triffids.

You can plant much closer together and equidistant to each other.

I topped up with topsoil, compost, old compost from pots, manure and sharp sand.  If you have the energy then dig it over first.

when i started to dig my garden up for beds, I realised I was in for a bit of pot throwing!
So I dug out 1 spade depth of the slimy stuff, and back filled with good quality top soil, then constructed my raised beds above this, and incorporated plenty of compost/leaf mould and sand.Pretty much anything grows there! including some lovely caulis.