This is not exactly the same as the rogue and the rule follower. Although the practical person is often a rule follower (though not always), rogues are not automatically dreamers. Rogues like Patrick Jane are aware of the rules, even as they violate them. In fact, they often use the institutional rules/social rules to accomplish their ends.
Dreamers, however, exist in a world of non-awareness. They aren't rogues or rebels because they don't realize that the idyllic world they swim in isn't the way things are.
In truth, the archetype is not entirely appealing since, well, somebody still has to do the vacuuming. When you read about Louisa May Alcott's family following idealistic Amos Alcott to the so-called utopia of Fruitlands, you start thinking maybe Abby May Alcott would have preferred a husband who worked in an accounting office. (A post about archetypal dreamers in manga can be found here. As the post indicates, these dreamers never stop doing their jobs.)
A more appealing variation is the optimist--a realistic dreamer who wants to think the best of people. Jamie from Blue Bloods presents himself as a hard-headed idealist, an unusual combination but entirely believable.
"100 years ago at this family's Sunday dinner, at least one brother or uncle at the table would have been a priest," Frank says in one episode.
"You're talking about Jamie," his daughter-in-law responds.
However, later, Frank says to his father, "He would never have lasted as a priest. He's got the conscience but not the humility."
Idealistic Jamie is paired with equally idealistic, just as hard-headed, yet slightly more practical Eddie. It's a workable combination!