What is your favourite Coltrane album ?

Inna - I think the 3 you mention are good places to start. Something not mentioned so far (at least give a listen to it on Tidal or Spotify): Coltrane Live at the Half Note "One Down, One Up". Has great ambiance.

I agree with Mapman's choices. If it has to be kept to two choices it has to be Giant Steps and A Love Supreme as the two which best give a sense of the scope of one of the very greatest jazz musicians of all time. Giant Steps turned the world of improvised music upside down and would forever alter the way the saxophone would sound in jazz. A Love Supreme is, arguably, his best recording. An open window into Coltrane's deep spirituality, this four movement "suite" is modal and free jazz at it's greatest. In some ways difficult to listen to, but utterly amazing music.

Thank you all. A lot to check out.
Orpheus10, thank you, I liked that. But it's quite different from Coltrane, though I understand that he both influenced many and was influenced by various music and traditions.
Miles Davis is my favourite jazz musician period.
I don't quite consider John McLaughlin a jazz musician, though in many ways he is by discipline. He can't really be categorized. He used to say that his strongest influences were by Miles Davis and John Coltrane. But also, of course, Indian and Spanish flamenco music. American blues too.