Sri Aurobindo
Letters on Yoga
2. Integral Yoga and Other Paths
I don’t know of any [Vedic Rishis] that have taken birth this time. 
According to the Puranic stories there must have been many Rishis who were far from being jitendriya jitakrodha. But also there are many yogis who are satisfied with having the inner experience of the Self but allow movements of a rajasic or tamasic nature on the surface, holding that these will fall off with the body.
Current publication:
Sri Aurobindo. Letters on Yoga // SABCL.- Volume 22. (≈ 28 vol. of CWSA).- Pondicherry: Sri Aurobindo Ashram, 1971.- 502 p.
Other publications:
Sri Aurobindo. Letters on Yoga. II // CWSA.- Volume 29. (≈ 22-24 vol. of SABCL).- Pondicherry: Sri Aurobindo Ashram, 2013.- 522 p.