The ideal urban commuter needs to be quick, light, practical, not to expensive or flashy but with enough quality to be durable and reliable.
If drop bars are appealing, I would recommend a cyclo-cross style with disk brakes and full set of threaded eyelets ( for rack and fenders). A more conventional roadbike can work, but I would still look for eyelets and a generous tyre clearance.
If you prefer flat bars, a similar spec non-suspension disk "hybrid"
You need a gearing system suitable for your fitness and terrain.
Accessories: lights, fenders, rear luggage rack, lock, helmet, gloves, puncture-resistant tyres, repair kit, luggage.
Use your local bike stores (LBS)
Route-finding is key to a quick, safe commute. Don't assume that the driving route is best. Identify and avoid if possible, dangerous roads and intersections. Trial and explore you route at the weekend.