Depends on your goals.
Why are you keeping chickens?
Why do you think you need more than one male?
Multiple males can be a nightmare of a train wreck,
the competitive environment they create can make them all behave at their worst.
If you are new to chickens, it might be best to have no males,
until you get some chicken experience under your belt.
Young males(under 1yr) can be a real PITA starting at about 4mo.
If you do decide to keep multiple males, make sure you have separate enclosures/crates ready to go, cause when it gets ugly it happens fast.
On ratios:
The 'rooster' to hen ratio of 1:10 that is often cited is primarily for fertility efficiency in commercial breeding facilities.
It doesn't mean that if a cockbird has 10 hens that he won't abuse or over mate them.
Many breeders keep pairs, trios, quads, etc
It all depends on the temperaments of the cock and hens and sometimes housing provided.
Backyard flocks can achieve good fertility with a larger ratio.