After my betta passed on

I have purchased 2 honey gouramis, but I think they are both males but one isn't showing as much blue.
They are starting to become quite aggresive with one another, they are only in a 10g tank with 1 neon and 1 oto.
I am just wondering if they will chill out or if one should be removed.
There are plenty of plants and hiding spots but they are continualy chasing each other around, I just don't want either of them to get hurt, but know little about honey gouramis.
If anyone has any info or advice I would REALLY appreciate it!
Thanks