C-Chord by Kamaljith K V, licensed under (CC BY-SA 2.0)
There are thousands and thousands of chords you could learn, but the truth is you will never use most of them. In my experience most guitarists will use the same chords over and over again for 90% of their playing.
These chords are the 10 in my free report, The 10 Chords That Every Guitarist Needs To Know.