Who are the Essential Mystics?

A reader of this blog wrote the following message to me…

Hi Carl. Thank you for all of the incredible information about mysticism on your website. It’s been a tremendous resource. I was wondering if you had a moment to scan this list and see if there’s anyone you would add or subtract as an “important”, “top shelf”, etc. mystic that i’ve missed. Thanks again, I appreciate your suggestions.

Anthony of the Desert
Desert Fathers & Mothers
Augustine of Hippo
Bernard of Clairvaux
Hildegard of Bingen
...