Ruhan of the Fomori While maybe not the most consistent Jeskai commander, Ruhan of the Fomori can be very fun to play
Heliod, Sun-Crowned goes infinite with any number of cards across formats: And that isnt counting the large number of 3-card combos
Notable Legacy inclusions are [c]Ethersworn Canonist[/c], [c]Imperial Recruiter[/c], the first reprint of [c]Councils Judgement[/c], and format-defining [c]Force of Will[/c]
You can put it all together with a mana cost reducer (Hazoret's Monument, Goblin Warchief), a sacrifice outlet (Skirk Prospector is the best one), and some kind of mana engine (Birgi, God of Storytelling, Runaway Steam-Kin)
In short, having access to flexible interaction means we dont have to choose what decks we want to interact against