second is one a type of argenitne saguaro (e.pascana, terchekii, atacamensis etc)

the look similar to melocactus, but the shape is always off

third is opuntia microdaysis. A common one.

first one haageocereus seticeps. but just making a wild guess. Could be the relatives weberbauerocereus or espostoa...

Thanks Stefan, That was a big help. I wouldn't have known where to start. I kept looking with what you shared. Echinopsis terscheckii looks like it fits for the second.

Almost had them for a year. Here is an update Jan 3 2021

These two are still alive