To be honest I'm not too familiar with either poizon or obo pre-complexity.
The rest though;
BlameF: Decent IGL for heroic but didn't really make them better than MODDII or Snappi had as an IGL (he fragged better but the team kind of got the same finishes as with the two other guys).
K0nfig: The black sheep of Danish CS:GO. Known to be toxic, outspoken and a "larger than life" personality. Hard to fit into a team if he couldn't be the star until he joined CoL.
RUSH: Washed up NA player who could surf around between lower ranked teams in NA. Yeah he won a Major but is probably the least to get recognized for it. He wasn't dominant at any point during that Major. Solid but at the end of his career.
It was an unlikely formula that just worked.