Hydrogen fuel cell with capacitors (for high load events) would work pretty well. There are a few major advantages over battery EVs

1. Can use existing infrastructure (like removing 89 octane at gas stations because it's dumb and no one uses it and replacing that with hydrogen tanks)
2. The fact that fueling up doesn't take hours
3. You don't loose range over time (or at least nowhere near the way you do with batteries)
4. The form factor of the vehicle can be more easily shared with ICE platforms than battery EVs

It's funny because as this whole EV push is failing, Toyota (who is all about hybrids and hydrogen fuel because they make better sense) is laughing at the other car companies who are taking big loses on BEVs. Unless battery technology makes huge improvements (or all the worlds governments go crazy on regulations), BEVs are gonna crap out hard and fast.