Most people have more than one rat, and if you decide on male rats and don't neuter them, you will end up having at least two male intact rats. I have two, and they have tiny skirmishes but are good mates overall. It's far preferable to having one rat; they need the company! So my answer is, of course yes, unless you're super unlucky and end up with some abnormal aggression situation. Some homonal aggression is normal when they're five months or so, but it's usually not so serious that neutering is required.