Agave attenuata
These hardy plants give a garden instant pop if you need a big plant in a hurry these are your best bet. They are everywhere around the suburbs and can get quite large in clumps so can be easily thinned out and given away to friends and family. Just bury the chunky stem in a small mound to support their weight facing into the light and they will quickly take root. soon you will have pups springing out of the base and can take these as cuttings.
I don’t think they are attractive if “over used”