This^^^^^^^^^^Tobirama or Karin
But when he tries Tobirama > Karin..... and that is the point.Karin Uzumaki. People say Tobirama except Tobirama can't sense unless he tries, which is why he couldn't sense Madara. Karin can sense without trying.
Hinata, Shino and Kiba aren't sensors per se, they just have tracking abilities, they don't sense chakra.
OT: Karin's. Her sensing is... 'different'.