Identification: Cacti (or succulent) purchased in Joshua Tree

Looking to get some common and scientific names for a couple cacti I purchased a few years back.

The two larger ones seem more common but can't find exact matched online but the thin smaller one I can't find anything that looks similar but the growth habit looks like a euphorbia of some kind.

Thanks!
Kevin

 

I think #2 is a short-spined form of Trichocereus spachianus.

 

thanks for the tip! I think I found the form

Trichocereus spachianus f. brevispinulosus

 

That is the one I was thinking of, I am just not sure if that form name is accepted.