What I have to say may not sound welcome at first reading but I offer it for what it is made worth for you by you.
Do not ask of other's experiences or try to be guided by other's input in meditation.
Each meditational experience is a UNIQUE Path of a Unique Immortal Soul to the One Supreme. Inputs from others about how this works are iether heresay or even if personal experiences they are UNIQUE to thsoe people. Other experiences will make you either block or seek some experiences during your own meditation believing x is good and y is not so good.
If The Supreme is making you increasingly attached to the image of Narayana, meditate on it and "Trust" it Completely. This helps develop and strengthen FAITH. So Do not try ot gather faith and "knowledge" by asking anybody else, do not speak about this anymore Rohit, do not search externally from others or from books or form net etc. for what others' experiences are/were. Go Alone..or rather should I say Go with Narayana and no one else.
If you meditate regularly yes, you Will have Visions of other "beings" but if you assume each is a God, you will be deeply misled. Many visions are of hostile forces that come in to mislead you. Even if a Vision is a God, what matters that to you for you are beckoned by Narayana is it not? So just stay with the Imagery of Narayana whatever image of Him feels right for that meditation phase. ALL other visions are just a movie to be simply watched without any agitation for they mean nothing to you. Stay with Narayana image AT ALL TIMES (as you are inherently feeling driven towards) and you will be fine.
May you be well.