You ride in space?
It's a very general question, so I will give you general answers.
Don't buy the cheapest and for "urban" riding, you don't need the latest "trick" bike.
The fact you have a 26" wheel, means you can look for a used mountain bike say, 4 to 8 years old. A decent mountain bike that is now out dated, is still great for the street. I like full suspension, something w/ 4 or 5 inches of travel and it should have disc brakes.
I assume your "high power" battery is fairly big, so you should look for for a bike w/ an "open triangle", space for the battery. A bike w/ a rear shock and space for the battery is a little hard to find, but there are some out there.
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'03 Rocky Mountain Edge 2WD 260 Q100H frt and Ezee V1 rear 2 Elifebike 20A & 25A 9-FET controllers 12S/20Ah Multistar Lipo rear 5Ah Turnigy frt Luna Cyclops Extra lite Alex 24DM rims, Crazy Bobs run ghetto tubeless. 25 mph. Mean Well HLG-320H-54A
'07 GT Idive 4 4.0, Q100C 201 14S LiPoly elifebike 9-FET 20A controller. 23 MPH.