Ravindra Jadeja has slipped behind West Indian Jason Holder to second position after a week at the top of the rankings for all-rounders.
Jamieson had India and his skipper at Royal Challengers Bangalore, Royal Challengers Bangalore, dismissed twice in the final.
Kohli scored 44 and 13 in both innings of the WTC Final against New Zealand.
Kyle Jamieson has had a dream start to his Test career.
Williamson said winning the World Test Championship title is a 'special achievement to be savoured' by his team which relies on "bits and pieces to be competitive".
New Zealand rode on superb knocks from veterans Williamson (52*) and Taylor (47*) to win the World Test Championship final by 8 wickets at the Rose Bowl on Day 6.
After guiding his team to a massive win, Jamieson said it is surreal to be crowned the champions as he was happy to play his part.
Kohli could not get going in the second innings.
Rohit Sharma (30) was watchful until Tim Southee trapped him in front of the wicket towards the end of the day's play in Southampton on Tuesday.
Jamieson was the star of the day for New Zealand as he picked up his fifth 5-wicket haul to help New Zealand bundle India out for 217 on day 3 of WTC final in Southampton.