Scribbled basics of all Bhakti and Sufi saints by referring this table. This to my mind is 'the' source which UPSC is referring all the time while setting the papers. For example- last time they asked on Sheikh Ahmad Shirandi and Nimbarka, Kabir, which is given here.
While writing this, I had following variables in my mind- timeline, i.e, who is contemporary of whom, weather they were Shaivaite or Vaishnavite, if they founded any further sect (samprada), major literary works if any, and region of their influence.
Please bear with my handwriting, and some of the spelling mistakes, especially while using hindi words, which I have used for easy remembering. 
Bhakti_Sufi_NCERT.pdf
This is the table used as reference- (page 167, Theme 2, New NCERT, at the end of the chapter)
