What DAW are you on? Many of them have some pretty great built in synths.
When you get into talking about sound design, it's really less about the synth and more about how you mold your sound.
Countless upon countless "normal" sounds in all forms of popular music are simple waveforms like sawtooth waves that practically any synth should be able to do. The rest is simply about proper use of filters, distortion, envelope, simple modulation, etc.
If you're looking for a chill sounding pad type effect for a chill dnb track, then I recommend building out a simple sawtooth wave with some relatively aggressive low pass filtering on it. Add some chorusing and increase the amount of voices to maybe 5. (If your synth allows it.) If it doesn't sound right, try playing around in different octaves. Octaves make a massive difference.
Hope this helps a bit! When in doubt, remember that less is more. Start simple. Almost everything is simpler than it seems.