I hate Girija but he is the only one who can drive the country right at the moment....
Personally speaking, I dont see any other capable leaders....

CPN UML
MK Nepal... he is not worth even being opposition leader
Sahana Pradhan - Not much known
Bamdev Gautam - Oppertunist, but good opposition

NC
Deuba - he is oppertunist
Susil Koirala / Ram Chandra Poudel - Lacks Vision
Dr RS Mahat - may be a good and young candidate

CPN Maoist
Just left the jungle so cant just believe yet
Prachanda - Got vision but too negative to others
Dr B Bhattrai - got ability but doesnot know what he speaks

Other
Badri P Mandal - too oppertunist
Rajendra Mahato - just thinks of terai
Amik Serchan - not yet ripe enough

Lets not talk about Gyanendra Shah, Surya Bahadur Thapa, Lokendra B Chand, Marich Man Shrestha, KP Bhattrai, Rukmangad Katwal