Tomb Many Graves 2 is a gravestone mod that has a few neat features that sets it apart. As soon as you respawn from death you’ll have a piece of paper in your inventory listing all the items you had before you died.
Graves are marked by the players’ heads and names so they are easily separated from other players. Plus each grave is locked to those players so there’s no chance of anyone stealing your items before you return.
And once you get your items back they should return to their original slot as well making organization a snap!