Primaris are Primaris, their own separate thing. Only regular marines can be in a Crusader squad.
You may want to check out
http://www.bolterandchainsword.com/forum/7-black-templars/ when looking for advice and modelling ideas. It'a probably a good idea to purchase a few of these to help add some flavour
https://www.games-workshop.com/en-GB/Black-Templars-Chapter-Upgrade
Tacticals can be used to create pretty much anything from Sternguard to Assault Marines if you want, you've just got to have the right gear to give them and/or paint scheme to identify the particular unit their are. This can be said of almost any marine kit to be honest as they're so interchangeable.