Quote:"the dutch is a laugh for own king's safety."
The most played setup against the Dutch starts with g2-g3 somewhere. This is a good move of course, but hardly means to take benefit of the supposed unsafe Black king. The quoted statements is bullocks.
And what is wrong with the king's safety in the KI or the Closed Benoni? Still Black can initiate a kingside attack by preparing f7-f5. One should not get scared off too early by the statistics mentioned by Dutch-Kalasnikov.
I probably overstated things a bit

, but with the dutch the variations with an early Qb3 or an early h4 against the Leningrad are not my cup of tea for a safe kingside position. The KI imo has the disadvantage of allowing a couple of threatening white systems like the bayonet and 4-pawns, while the Sämisch is though not very popular quite nasty to meet without thorough preparation.
I agree that the closed benoni (I assume you mean the setup c5 d6 e5) is quite safe and have played it on occasion myself, but chances for activity are quite limited if white doesnt exchange pieces and works with a "limiting scope" strategy with moves like h3. I have always looked at it as a slighty worse version of the Hübner setup in the Nimzo.
Main problem of course is to recommend something both safe and potentially agressive against d4. In my experience it is either or. Safe options are QGD, Nimzo/QID, the czech benoni. While more agressives are KID/Grünfeld (I use those myself in combination), dutch, Benko and various other systems. With the safe options the problem is that often it takes time to be able to go agressive, while the agressive ones often allow white to get agressive as well. So my personal recommendation would be to choose something safe and look for the more active variations there.