The best replacement for mgmt is vampire weekend.

The best alternatives to mgmt are rated as following:
★★★★★  vampire weekend
★★★  bob marley
★★★  empire of the sun
★★★  snow patrol
★★  passion pit
★★  animal collective
★★  far east movement
★★  mgt
★  arcade fire
★  tame impala
  mgmt
  m83
  of montreal

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Speaking about mgmt, one probably shouldn't forget about kid cudi.

Other search terms related to mgmt and their ratings are:
★★★★★ kid cudi
mgmt
me remix
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Google Trends

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mgmt
vampire weekend
bob marley