Karvanista, Loyal Lupari Karvanista, Loyal Lupari works well in pretty much any human-themed Commander deck
Charred Graverobber I doubt Charred Graverobber sees extensive play in true outlaw decks (mostly because I find the mechanic weak), but itll be an excellent support piece in a variety of typal decks helmed by commanders like Admiral Beckett Brass, Etrata, Deadly Fugitive, and Anowon, the Ruin Thief
(Monsters that have been determined to be destroyed in battle still remain on the field at this point) Card examples: Ryko, Lightsworn Hunter, Spirit Reaper, Gorz, the Emissary of Darkness, D.D
Finally, we come to the Paradox Destinies Tins
Most of the time creature decks sideboard a white planeswalker, its to give a different dimension against someone playing a long game with a lot of removal, and Serra the Benevolent seems so much worse in that role than Gideon, Ally of Zendikar (or even Elspeth, Knight-Errant.) This is to say nothing of the extremely high burden of proof for any four-mana card in Modern