Priests get Realm Spells.
Priests of Eric get Realm Spells
Preists of Haelyn get realm sspells.

Why not Rangers and Paladins?

I'd assume Paladins cast realm spells like priests but what about our
ragers?

The rulebook doesn't go into very much depth with rangers. One would
assume they worship Eric, nature as a force, or in the case of a Sea
Ranger: Nesirie.

I'd like some ideas about Warrior Realm spells (not including
fighters!).

of course, unblooded ones would be unable to cast such spells.