I'm thinking of suggesting a guy to leave.
Why do you want him gone?
He is so dishonest, I feel so uncomfortable being around him
It is ok to remove someone from a group if you do not like them. You should tell other people why because they might question your motives.
I will do it and force that guy to leave.
You should discuss with other members of the group and make the final decision. Maybe they all agree with you.