Agave celsii “Multicolor” is a very attractive plant. They will stay at about 2-3ft. across and can handle full sun, or even a little shade.
They are hardy down to 20F if dry, or 25F in a colder wetter winter.
They are toothy, but not too vigorous. Although watch out for the marginal spines.
Agave celsii are from Mexico, but this cultivar may well have been first found in Thailand. The original species is a softer leaf, and fully green.