I actually think the Presbyterians are right on polity and that we should have a full on Presbyterian system.
The NT seems clear that the local congregations were allowed to make a lot of their own decisions, yet the Apostles were alive then and the Church met in councils and synods.
Ideally, I believe the local congregation should be autonomous on issue not essential to the faith and that Christians can disagree on while the higher governing bodies deal with preserving more important doctrinal issues and some forms of discipline.
I'm Southern Baptist, and our churches tend to be led by a single pastor. I noticed that regardless of denominational affiliation, single leader churches tend to have pastors who lack accountability, primarily in non-denominational and Prosperity Gospel churches. I also see single pastor led churches as akin to the episcopal polity, just on a congregational level.
I think a plurality of elders provides accountability. To me, congregationalism seems like it is taken too far as a reaction against the episcopal system, while the Presbyterian structure seems to be a nice balance.