Obviously there are many many superior personalities, who have somehow or other served the Supreme Lord. All throughout the universe, there are many great personalities such as Lord Siva, Lord Brahma and many other of the Devatas….or the manus…..there are many great devotees and all these devotees have blessed us! And can bless us more, since their blessings are a great benefit.
The blessing of the Spiritual Master is the greatest blessing! So all these devotees can bless us because they have credit with Krishna and therefore they can attract the mercy of Krishna! And in this way we can be uplifted even beyond what we deserve!