Since you’ve said you want something manageable in the city and also stand out from the sea of commuters, we’d recommend taking a look at the Honda CB350 and the Triumph Speed T4.
Both have upright ergonomics, good ride comfort and have a well-balanced chassis which ticks all the boxes you’re looking for. Of the two, the Speed T4 will offer more performance than the Honda, and both are similarly fuel efficient.
Also, Bajaj will be downsizing all the Triumph 400s to 350cc to take advantage of the new GST 2.0 regime, and these bikes should be released by the first half of the year. Once this move is complete, expect prices across the board to be quite a bit lower, and if you are shopping in this space, it would be prudent to wait a few more months.