For algebraic geometry, I would think that Journal of Algebraic Geometry is the top specialized journal. However, there are many excellent journals that are nominally in a different (neighboring) field, which accept algebraic geometry submissions (and have algebraic geometers, or people interested in algebraic geometry, in the editorial board). Examples include:

• JDG
• Geom. & Topol.
• Algebra & Number Theory
• J Topology.

(Of course, there are also many other non-specialized journals that are suitable for an article that is almost Inventiones- or Duke-level.)