The Arkansas Razorbacks from the University of Arkansas are the most successful Arkansas football team. Arkansas does not have a National Football team, therefore the most successful team would be a college team.
It is arsenal .F.C.
Rangers Football Club are the most domestically successful football team in the world
I think Liverpool FC
Glasgow Rangers Football Club
linfield fc from northern Ireland
The most successful team in Welsh football is Cardiff City FC.
Manchester United is the most successful English Football Team. They have won 62 major trophies in England alone in the history of the team.