Male guppies and a single platy

[Natani]

Hello, I have a 29 gallon tank with a few small plants, driftwood, gravel bottom, and 4 Marino moss balls.
2 small Nerite snails, 6 black phantom tetras, 1 platy (gender unknown), and 3 male fancy guppies call it home. All is well so far but then again the fish are pretty new. But the tank is not. It is cycled. I have had fish in it already.
I want to make sure there is peace in the long run. Should I add more male guppies so I can avoid fighting in the future among them. Not interested in breeding nor do I want tank full of guppy babies.
Will the platy be ok as the only platy in here?

Looking forward to the replies. Thanks in advance.

[Autumnsky]

The male Guppies are going to be mostly fine, exception being if there is a bully male. Their activity might be spread out with 2-3 more.

If there is a male and female Platy there would be babies. Lots of them.

So even though they would prefer to have friends, the one fish will tag along with some other fish.

As long as you can be sure the sex of any additional Platy matching the one you already have you could get more.