Vigo is the hooded figure.
I don't get why so many people seem to not get this.
"I have been obsessively deciphering Vigo's Journal."
the person writing these journal entries isn't Vigo as why would they decipher their own work and seem surprised by it?
The hooded figure is Vigo: The hooded figure he seems to know his way around scientific equipment (considering what little info we have that very in character with Vigo) and considering the events contained within the journal the character there dose not have said skills again making them not Vigo.
What if the hooded figure is Benedict Baker?: Baker appeared to be journalist who actively seeked to enter The Entitys Realm and i don't know about you but i don't think a journalistic career involves knowing your way around beakers and having clearly advanced skill in chemistry and engineering.