I have three male platys and one male guppy and the guppy never bothers anyone! I have a platy playing "tank boss" with the other two platys. Mr. Guppy is a nice guy!
I have one that hangs behind the filter frequently to avoid the boss. The other one swims freely around the tank but gets chased frequently. i have a nice clump of java moss and a piece of driftwood in the tank but the other plants are new and need to grow out so the cover isn't the best yet.
I hope they work it out soon. If not, I will revamp the stocking because I don't want the stress going on in the tank.