the king's indian is quite interesting, it's just that you have to know a lot to make it so. the open games is fun for either color. also quite sound. for black openings vs 1 d4 and company, you can't really get so many open positions. you could try the tarrasch queen's gambit declined. quick development and open lines in return for a weak pawn in the endgame. also not so many move orders is a big plus.
all this assumes fun is getting open lines and tactical fights and so on.
i already tried the london and the kings indian but they are super boring, what should i play?