Off the top of my head Sinema became famous for blocking a minimum wage increase. She was definitely a establishment spoiler because she didn’t do anything but block stuff. Manchin gets a pass in my book because he was actually voting for his constituents. He ran as Democrat but he was actually a left leaning republican representing West Virginia which is Republican territory. He didn’t block much but he stonewalled anything that was remotely progressive. Torpedoed any bill that didn’t give massive concessions to republicans or West Virginia.