The best replacement for rococo is baroque.

The best alternatives to rococo are rated as following:
★★★★★  baroque
★★★★  neoclassical
★★  baroque architecture
★★  neoclassicism
★  neoclassical art
★  romanticism
★  baroque art
  art nouveau
  baroque style
  english rococo
  louis xv

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Speaking about rococo, one probably shouldn't forget about baroque.

Other search terms related to rococo and their ratings are:
★★★★★ baroque
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rococo
baroque
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