Developing a full-blown classification of relationship types here seems to be a tad excessive :-) Let me just point out that the leader-peon type (see e.g. this) is not quite the same thing as the hero-sidekick type.

In real life I, for example, have zero desire to be either a hero or a sidekick. Accordingly, none of my relationships, either work or personal, can be described as hero-sidekick ones.