Haan I can understand why are u confused.. so do read dasm granth and chuabis avatar in dasm granth written by Shri guru gobind singh ji . Guru sahib has explained all the avatars of vishnu as avatar of param atma or onkar. Who ,he said is shapeless and present everywhere same as madhav(Shri Krishna) told in Sri mad bhagwat geeta. Krishna says to Arjun 'jo main tumhe dikh raha hun vi mera roop nahi hai' I am shapeless and present all over the universe.so gurus have explained those avatar as incarnations of onkar. Onkar word was used by gurus and pramatma word was used by Shri Krishna in geeta. So that's why guru Arjan dev ji had said that worship anyone whether he is rama krishna shiv or waheguru. Worshipping them means you are worship the supreme power who can't be seen but can be felt. But be sure that u have to worship only one and respect all. Hare Krishna. Waheguru.
No one it's Lord Vishnu's pic not of madhav and balbir Singh ji madhav's all leelas can't be represented in one painting.. he is unended. Hare Krishna.