Bass can sound melodic too.
This article talks about plucking the bass like a guitar.
Use your thumb to hit the root note, follow by your index finger plucking on the open D string and middle finger plucking on the open G string.
For the left hand, you can use your index finger to fret the root note, ring finger to fret the open D string and last finger to fret the open G string.
Follow the above tab and you should be able to get what I'm trying to say.
Have fun.
