Looks like Schalow’s/Livingstone’s/Knysna to me. I can’t see purple on the back and the white eye streaks lend itself to those species if I’m not mistaken.
Schalow's and Knysna turaco always have some white in their crests, which this individual lacks, so we can rule out those 2. Guinea turaco as well as certain subspecies of Livingstone's lack the white.
The best way to tell apart the Guinea and Livingstone would be crest shape, but that would be easier if seen from the side.
However if I would have to ID based on this photo, I would say Guinea.
