1978 Lotus - Dominated by taking advantage of ground effect winning 8/16 races and getting a 1-2 in the championship despite Peterson's tragic death (

1988 McLaren - 15 wins and 15 pole positions in 16 races, and in an era where reliability was not bulletproof only had 1 mechanical DNF all season (Prost at Monza).
1992 Williams - 10 wins from 16 and ended a run of 4 consecutive seasons of McLaren Honda winning the Drivers and Constructors titles.
2002 Ferrari - 15 wins in 17 races and has the record of the only season in which a single driver (Schumacher) finished on the podium in EVERY race. Won 11
2013 Red Bull - Maybe didnt dominate the first half of the season too much, however it allowed Vettel to become the first driver in F1 history to win 9 consecutive races in the same season.
2014 Mercedes - Most F1 wins ever with 16 out of 19 races and 11 one-two finishes. Only downside was that the reliability wasn't bulletproof.