Which EV can go 600 miles with one charge, or with so little charging?

How much does that car cost?

Are you assuming, that every charger on the way is 200kW?

Lucid Grand Touring can do it in one charge (that lasts ~45 minutes). Expensive, but it could do it.

I did Shreveport, LA to Pesos, TX as an example.

If you're OK with 2 charging stops, an Ioniq 6 or a Tesla Model 3 will work just fine.

Also, charging speed is irrelevant to how many stops you need. Most chargers are >150kW these days, though.

If you truly want to minimize charging stops, you'd be better served charging 3+ times for shorter periods of time, though.

You can get Model 3 LR that will do it for $20k used.

Like everyone else, you are thinking in "gas car" trying to resolve an electric car problem.

You start every trip in an EV with full range (unplug from home base charger). You drive 300 miles. You full recharge. You drive another 300 miles. You plug-in and go to sleep.

600 miles. One charge. $20k EV.