Looking at the Reaper.
Listed as a race, they have aspects and a flavor that better suit it as a class. Reapers choose a Realm with which they are tied to, effectively birthed from. This Realm then grants them several benefits specific for the Realm. Their generic base benefits are a summonable? Weapon unique to them, that grows in power with them. Said weapon can also launch a, once daily, blast of Realmic Energy at a target.
Just an opinion....this, to me, looks like a Warlock. Powers born from a source, a weapon that is always available. The only thing missing is the spells....which can be accessed by ANY class if so chosen(some restrictions may apply ;) ).
My original character idea was to create a class that accessed Shadows. This was before purchasing and gaining my copy of Veil of the Void(Don't wait, buy now...you won't regret). That has since changed after looking through the Veil as a whole(Looking through the Veil...that needs to be the title of a board. Just saying). I want to propose a new Class that will work with ALL of the Reapers. A class that will double down on their ties and truly make them a force to reckoned with.
I give you the Bourne.
Merriam-Webster definition is Boundary, Limit and Goal, Destination...little confusing there. Synonyms is where the application becomes clear. Dream, Design, Intent, Intention...Purpose.
The Bourne will be an Arcanter style class that will delve deeply into their Realmic ties, learning how to better utilize those ties. Each will have their own Novice, Apprentice, Adept and Magus level spells. The benefits will expand further than previous listed, expecially expanding upon the Weapon and Reanding Strikes. Each Bourne will have Sur-Title, listed below: