Self-seeders

I have another cunning plan, loosely connected to the self-seeding plants in this thread.
My plan is to have big clumps of plants (preferably edible) that will either self seed or be perennial. I'd like them all to join up so that there is very little bare ground between them.
Here's my list, so far:-
(Leaves) Rocket, Landcress, Chard, Spinach, Spinach beet, Lettuce, Parsley, Radish, Beetroot, Turnip, Kale, Tree Spinach, Chinese leaves, Mustard
(Shoots) Chives, spring onions, Elephant garlic, Perennial leeks, multiplier onions, onions left to bolt
(Roots) Not many - radish, Oca, Chinese Artichokes (not JAs), Salsify, Scorzonera, carrots
(Fruits) Strawberry, soft fruit bushes, Rhubarb, apples, pears, plums.
(Herbs) Mint, Lemon Balm, Oregano, Marjoram, Sage, Thyme, Rosemary, Lovage, Angelica
(Flowers with uses) Calendula, Nasturtium, Day Lily, Comfrey, Soapwort.
Possibles - Amaranth, Quinoa.

I should be able to pick something leafy, herby and oniony all year round without a lot of effort

If I supplement this list with non-hardy annual veggies - tomatoes, cucumbers, courgettes, peas. beans and "buy" potatoes and, maybe carrots (both of which I struggle with) I'd be very happy.

Can you think of any other edible plants that would earn their keep?