1) Legislator 
A crossbencher is an independent or minor party member of some legislatures, such as the British House of Lords and in the Parliament of Australia. They take their name from the crossbenches, between and perpendicular to the government and opposition benches, where crossbenchers sit in the chamber; compare frontbencher and backbencher. ==United Ki...
[n] - a member of the House of Commons of Great Britain who does not vote regularly with either the Government or the Opposition
noun a member of the House of Commons who does not vote regularly with either the government or the opposition