jess,
1.sota looks like the
Discosma neglecta but not too sure
2.looks to be what is called the fuzzy
green mushroom, look for
Rhodactis sp.
3.looks like one of the variations of the speckled mushroom
Actinodiscus mutabillis these can be many differant colors
4.the beautiful purple is another of the mixed variations look at basic
Discosma sp.
all of them shoudl do well in your tank, and will multiply with no problem, if you take some smaller LR piece and place it around them them willgrow on to it and you can trade a few in from time to time.
HTH