The Best Rear Setup of Mountainbikes

Before you start scrolling down and criticize the photos, I would like to put a safety net that the following photos are taken from the internet and are scrutinized and judged by me as a best rear setup for Mountain Bikes ^^. Take note rear only! =) And So far only these Units passed my standards and taste without even trying them . hehehehe..... But if anyone willing to send me units to test, make sure the rear setup is similar to any of these units. sweet =)

Criteria:
1. Simplicity: Mechanical setup and moving parts (The lower the better)
2. Technology: number of shocks (the lower the better)