help with id

hello all..have some new cacti with no tags..any info would be great help thank you







first pic is a  Euphorbia
secound pic is almost wrapped in spines looks cool.

First one is definitely a euphorbia. I used to have one. Never found out what the species was. ( back then I didn't try to hard.

Second one looks like a trichocereus maybe.

Third one is a tough one. Maybe a species of cholla or autrocylindropuntia?

Fourth one is most likely a species of aloe but it may be worth checking out the genus agave as it could be one of those.

Last one looks like an oreocereus. Most likely oreocereus celsianus.