VladMamu has a certain ignorance (very natural) of a lot of things Bangladeshi/eastern that he is always eager to make-up for with enthusiasm and willingness to learn/discuss. Would be nice to have him back in Forget Cricket.
Rasel was also a pretty funny guy and had a decent head over his shoulders - great for cricket discussions.
The Fabulous Fabster has probably been around, but very rarely.
Sham lokta je keno oi semesterta fail marsilo bangladeser khela dekhte giye - baaper kache mair kheye forumer naam bhule gese. He was great for Rana/Alok debates (as Rubu mentioned), and also seemed to know quite a lot about cricket in general.
Screw the IPL, I'm going to the MLC