One thing I notice is that you want to sound like this or that artist and so on, and you wonder why you can't manage sounding like them - well because you're not them.
Take a step back, experiment with sound design your own way and find your own sweet sounds that will make your own signature in your tracks. Be you.
Then you have a whole world of tutorials and techniques available by a Google or YouTube search. Be open minded and try stuff out, even stuff you think you won't use in the end - who knows, maybe you have loads of fun experimenting with them anyway.
I for example produce some kind if Electro/House that I'm too lazy the even care to specify more - but boy, do I have fun making reese basses and ambient pads!
Anyway, to actually answer your question - for these House styles you use fairly simple synth sounds; plucks with different timbres, supersaw leads, basic bass synths, and so on. Just go to YouTube and search for "Avicii plucks" or something. You'll find endless lists of videos to choose from.
But one thing that has to be said, is that no matter how simple a sound may be, there can still be loads of time finetweaking it so it sounds awesome. Just because the technique is simple doesn't mean you can make it fast
So if you struggle with sounddesign - maybe you don't give the patches enough time?