You can only use exhaust abilities once per game, but you can get around that limitation by blinking the creature or any other effect that makes it change zones
This would usually be enough to find Pandemonium and some combination of Phyrexian Dreadnought and Reanimate, plus the mana to play them And a Final Fortune might end the game before the opponent has even taken a turn(!)
Joshua is the most interesting to me, because he's so many Lightning Helixes (and can discard extra copies of himself)
Lara Croft, Tomb Raider is all about uncovering legendary artifacts and lands from your graveyard, rewarding you for digging them up
You'd think Wizards of the Coast would eventually make a mono-red legendary creature that could do the job
To help you pick the right commander, Ive created this guide on top token commanders with simple analysis and statistics that make it easy to compare different cards