IMO these are the candidates for that question in no particular order, and if i had to pick 3 from these they would be (in order) Aspas, Chronicle, Yay
Aspas has been consistent at the top level for so long that i find it hard to argue that he is the closest we have to a GOAT in valorant, though in all honesty i dont think anyone really is the GOAT yet, there just hasnt been enough time to figure out who it is yet. Chronicle i picked again because of consistency and because he has the most trophies of any player. Yay is Yay, he was incredible in 2022 but i dont think anyone can consider him #1 at this point because of his 2023 season (yeah ik DSG had its own problems excluding Yay but still)
Though Demon1 IMO has the most potential to become the GOAT of any player, he just hasnt been in the scene long enough to consider him for a title like that.