1. D S P Anirudh has lot of knowledge in technicality. I think he is writing a "History of IR" book, with all dates of inaugurals :)
2. Dark Lord too.
3. Abdul sir too.
4. Then that WAP 5 members - one can't understand what they are talking ;) ...... but they come across as knowledgeable. Their post is not seen...
more... nowadays.
5. Aditya Siddharth - WAP 7.
.
Many more.......
But.......
The real all rounder of blogging, knowledge and general discussion is Subrat ji.
.