List of notable Sign-ups/Contenders for the top spots, in no particular order:
Timotheus: Arena player, 2k2+ achieved
Melkor: Arena player, 2k3+ achieved
JonSlow: Arena player, 2k3+ achieved
Modri: Arena player 2k2+ achieved
(czech) DraConT: Arena player 2k2+ achieved
Lyx: 2k4+ achieved
xiaofan_: 2k3+ achieved
Edie: 1st place MoA4, Arena player, 2k5+ achieved
CL_: 2k3+ achieved
BacT: 2k5+ achieved
Tim_: 2k4+ achieved
ACCM: 2k3+ achieved
PMR_Keif: 2k2+ achieved, Arena player
(czech) Janik: 2k3+ achieved, 2nd place MoA4
VIK_Vinchester: 2k3+ achieved
St4rk: 2k4+ achieved, 3rd place MoA4
DauT: 2k6+ achieved
vivi: 2k5+ achieved
Slam: 2k5+ achieved, 1st place MoA2
TaToH: 2k4+ achieved
Hera: 2k4+ achieved
stefanHD: 2k4+ achieved, Arena player
MetalRTS: 2k3+ achieved, Arena player
TheViper: 2k6+ achieved, 1st place MoA3
Timotheus: Arena player, 2k2+ achieved
Melkor: Arena player, 2k3+ achieved
JonSlow: Arena player, 2k3+ achieved
Modri: Arena player 2k2+ achieved
(czech) DraConT: Arena player 2k2+ achieved
Lyx: 2k4+ achieved
xiaofan_: 2k3+ achieved
Edie: 1st place MoA4, Arena player, 2k5+ achieved
CL_: 2k3+ achieved
BacT: 2k5+ achieved
Tim_: 2k4+ achieved
ACCM: 2k3+ achieved
PMR_Keif: 2k2+ achieved, Arena player
(czech) Janik: 2k3+ achieved, 2nd place MoA4
VIK_Vinchester: 2k3+ achieved
St4rk: 2k4+ achieved, 3rd place MoA4
DauT: 2k6+ achieved
vivi: 2k5+ achieved
Slam: 2k5+ achieved, 1st place MoA2
TaToH: 2k4+ achieved
Hera: 2k4+ achieved
stefanHD: 2k4+ achieved, Arena player
MetalRTS: 2k3+ achieved, Arena player
TheViper: 2k6+ achieved, 1st place MoA3