The first looks similar to A. ghiesbreghtii, but I wouldn't discount a lophantha/parryi hybrid.
The second one looks like my lophantha, but several people have called it a xylonacantha as well. Here's a link to a music video I did with the mentioned plant included:
YouTube - LEGENDARY PINK DOTS vs. AGAVES (the ouch! collection video)
The third is probably Agave "Mr. Ripple."
Good luck.