There are two kinds of controllers, or lords: one who is independent is called controller, and one whose orders cannot be neglected by anyone is called controller.
Regarding Kṛṣṇa's complete independence and lordship, Śrīmad-Bhāgavatam says that although Kāliya was a great offender, Kṛṣṇa still favored him by marking his head with His lotus feet, whereas Lord Brahmā, although having prayed to Kṛṣṇa with so many wonderful verses, still could not attract Him.
This contradictory treatment by Kṛṣṇa is just befitting His position, because in all the Vedic literature He is described as the complete independent. In the beginning of Śrīmad-Bhāgavatam the Lord is described as svarāṭ, which means "completely independent." That is the position of the Supreme Absolute Truth. The Absolute Truth is not only sentient, but is also completely independent.
As for Kṛṣṇa's orders not being neglected by anyone, in Śrīmad-Bhāgavatam, Third Canto, Second Chapter, verse 21, Uddhava tells Vidura, "Lord Kṛṣṇa is the master of the three modes of material nature. He is the enjoyer of all opulences, and therefore there is no one equal to or greater than Him." All the great kings and emperors used to come before Him, offer their gifts and pay obeisances with their helmets at the feet of the Lord. One devotee said, "My dear Kṛṣṇa, when You order Brahmā, 'Now you may create the universe,' and when You order Lord Śiva, 'Now you dissolve this material manifestation,' You are in this way creating and dissolving the material creation Yourself. Simply by Your orders and by Your partial representation of Viṣṇu, You are maintaining the universes. In this way, O Kṛṣṇa, O enemy of Kaṁsa, there are so many Brahmās and Śivas who are simply carrying out Your orders."