What are the best starter medical herbs

I have just recently started growing herbs.  That led me to learning about medical herbs.  I'm very interested in learning more, and I want to grow what I need.  I have started with kitchen type herbs, I also planted echinacea, yarrow, and comfrey.  What are your top oh maybe 25 herbs you think are the most beneficial?  Thank you for your help.

Oregano, sage, licorice, thyme, winter savory. Lemon balm-careful-its' invasive. Mint and honeysuckle. Same.  Self heal.  
Grow houtuynnia cordata, but only in a pot.
John S
PDX OR

Mullein, plantain, comfrey, mint, yarrow, nettle, dandelion, coltsfoot, goldenrod, horsetail, licorice, oregon grape, lemon balm, feverfew.

Oh, and lavender.

And two more - chamomile and calendula.

Jen-sometimes it's useful to think about what you want the medicine for, before you put your effort into a particular plant.
John S
PDX OR

25 is a lot. Rosemary, valerian, hops, hyssop, you're in a hot climate isn't it Jen? Maybe eucalypthus , ginger, grapes!,monk's pepper, viburnum,cloves, marythistle, skullcap, schisandra, perilla, passionflower, ginseng, java tea, marjoram, evening primrose, bitter gourd, chamomille, shi take,, juniper, jamaican sorrel, fennel, californian poppy, wild yam,  artichokes, javan turmeric,grapefruit, cocos tree, cinnamon, senna, carawaycayenne pepper, green tea, marigold, borage, absinth, horse radish, burdock,marshmallow,aloe vera. Pfew , have fun!

Wow lots of help.  The cool thing is I'm growing more herbs on the list then I knew. I have a lot to learn.  I have honeysuckle because I like the smell.  Lavender all over the place, chamomile because my daughter likes it in tea, I grow calendula as a companion plant in my veggie garden.  We have had grapes for years Red flame and thompson's seedless.  I have aloe vera. Just planted a cayenne pepper.  My herb spiral has rosemary,  thyme, 3 kinds of basil, parsley, chives, cilantro, oregano, and spearmint.  I have rosemary, peppermint, stevia, and ecanatia on the outside. I bought lemon balm seeds, I'm going to put it in a old cement sink that has a crack in it, that way it won't take over the world.  Lots of the herbs in your posts I have never even heard of, so I will look them up.  As far as knowing what I want, I don't know yet, I'm just starting this journey. I can't remember ever really regretting planting anything.  I learned when the tag on mint said it's invasive I should have taken that more seriously.  Even so I redid my raised garden bed, and don't mind mint in my walk a ways.  Live and learn.  Thank you so much for all your help,. I will hit the internet, and learn about all these wonderful herbs. Thank you.

I also have to say trying to recommend 25 is a lot!

I have not seen parsley mentioned.  I grow it for its health benefits.

My favorite is rosemary but you have to use a lot of it or plant it like a shrub 4' x 4'!

My other favorite is lemon balm.

These are really the only ones I really take advantage of the medicinal properties.  

Jen, you are part of the audience that I was hoping for in The Medicinal Forest Garden Handbook - that is people who want to know more about healing plants, like trying new ones, willing to invesitgate, but also have lots of medicinal possibilities already in place without necessarily realising it! So, for you and all the other brilliant suggestions in this thread, here is not so much a starter list but my (temperate) desert island forest garden top five plants for being used for a variety of health issues (though there are so many more to choose from in the book!):

Marigold (Calendula officinalis) for flowers to use in an antiseptic and antifungal skin balm - must have sun and be picked regularly
Valerian (Valeriana officinalis) for roots to dry and make into pills for anxiety and sleeplessness - likes damp shady places
Elder (Sambucus nigra) for flowers and fruit for syrup to use in colds and flu - prefers open setting and easily coppiced (pictured)
Cramp bark (Viburnum opulus) for bark to powder or tincture and use in spasmodic complaints from frozen shoulder to painful periods - loves a moist situation
Hawthorn (Crataegus monogyna) for flowers, leaves, berries for tea or tincture to lower blood pressure and strengthen heart - grows almost anywhere (NOT for use alongside prescribed medication for hypertension)

I am learning so much, thank you everyone.  I picked 25, more  to not be limiting, not to make anyone feel 25 must be listed, I should have just asked for favorites.  I value the knowledge given on permies, sometimes when I search information on the internet it becomes a bit overwhelming, so much info, but not sure what is accurate.  Thank you all.