It isn't my style of game, but if you like the Nimzo-Indian, maybe the Pirc or Caro-Kann would suit you. The Sicilian is sharp and by nature unbalanced. It can be positional, but it leads into opposite side castling games with opposing pawn storms and so on.
Defense to 1.e4 that is similar to Nimzo-Indian?
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Caro Kann can actually transpose into Nimzo Indian Defense