A great deal depends on what your focus is, culinary, medicinal, fragrance, etc. I used to have an extensive multi-use herb garden, but as I have gotten older I have pared it down to just a small herb garden with herbs I use most or like best.
I have gone from about 80 different herbs to 25 or so. The ones I have kept are basil, parsley, thyme, garlic chives, chives rosemary, mint, dill, winter savory, cilantro, sage, burnet, lemon verbena, lemon balm, thyme, lemon thyme, horehound, oregano, tarragon, lady's mantle, calendula, borage, catnip and probably a couple more I have forgotten. I would have chamomile, but it just doesn't grow well for me. I have horseradish, but never counted it as an herb. It is a border on my vegetable garden. Comfrey is another one I have, but it is planted in an out of the way corner. Sweet Woodruff is another one that is planted out of the way. I have a bee balm that is struggling where once it nearly took over, tansy, too.
Some of the useful herbs grow wild if you have a place to forage for them it saves garden space. Coltsfoot, yarrow, clover, thyme, mint, mullein, and bee balm are a few that come to mind.
What do you want to focus on in your garden?