Royal Charleroi Sporting Club
Charleroi SC played 137 league seasons and cup tournaments in the data, 1925 to 2026. Success weighs every finish by how hard that competition was to win; Efficiency is the share of what the club could have won that it did win; Edge compares that with an average participant (×1.00).
| 346 | Grimsby Town (England) | 9.9 |
| 347 | Sparta Prague (TCH) | 9.9 |
| 348 | Fortuna 54 (Netherlands) | 9.8 |
| 349 | Charleroi SC (Belgium) | 9.8 |
| 350 | K. Sint-Truiden VV (Belgium) | 9.8 |
| 351 | Independiente del Valle (ECU) | 9.8 |
| 352 | Haarlem (Netherlands) | 9.7 |