How many seeds do you really need?

This might be a bit difficult and liable to change. I think I must give Rugosa Friulana a go. Then again, are we choosing to cope with Armageddon, or just choosing our favourites. The criteria might result in slightly different variety choices. Favourites might be the most flavourful, whereas Armageddon would require resilience and productivity.

My essentials:

Tomatoes - Cherry Honeycomb, Beefsteak Burlesque
Cucumbers - Delistar
Courgettes - don't know but it might be a pale green Lebanese type
Beans - DFB - Rondo, CFB - Hunter or Helda
Carrots - Early Nantes
Broccoli - any tenderstem variety, say Matsuri or Skytree
Sweetcorn - Swift
Peas/mangetout - Carouby de Mousanne
Onions - any good storer
Chard - Fordhook Giant