Legend
An American named Robert Cabana and Krikalev were the first two astronauts aboard the International Space Station in 1998. He returned to the space station two more times and even did a six-month stay in 2005.
Source: nasa.gov
Krikalev spent a total of 803 days in space and was on six different missions by the time he retired as a castronaut. However, he continued to work as a director of manned spaceflight at Russia’s Roscosmos State Corporation.