Who is the best writer of sufism?

Hazrat Shah Walli Ullah Muhadic Dehlavi is the best writer on Sufism . His book named " Qolul Jamil " . It is written in Persian and its translation in Urdu is " Shafa U Aleel . This book is Encyclopedia of 4 common sects of Sufism .
Hazrat Shah Walli Ullah Muhadic Dehlavi is the best writer on Sufism . His book named " Qolul Jamil " . It is written in Persian and its translation in Urdu is " Shafa U Aleel . This book is Encyclopedia of 4 common sects of Sufism .