One could approach this from different angles, I think.
First: IMHO there's a huge difference between asking for a bass part played on a synth, and asking for all the known synthbass sounds for covering hit songs.
One train of thought would be that in order to make synthbass sounds, one needs a capable synth with at least two full-fledged VCOs and a good filter - preferaby 24 dB/oct.
There's something to be said for that. If you're gonna cover known synthbass songs, you're looking at lotsa tracks that rely heavily on a Moog sound. In case, opting for a Phatty or Model D seems the natural thing to do. That does not exclude other synths, but in case it could be a longer, more winding road.
There's another train of thought that says that any synth is usable for bass parts.
I could agree - partly. I've happened upon a great, natural bass sound on a weedy 1 VCO synth with just an added pedal (don't remember, but probably a chorus type thing).
In my mind it can be done, but on many synths one is looking at a narrower band of usable bass sounds.
The DM6 specifically, whilst flexible and a great offering for the price, would be one of the last synths I'd think of for synthbass. That's due to its Juno inheritance and its 1.5 VCO instead of 2, and its presumed 12 dB/Oct filter. To my ears, the core sound of the DM6 is weedy, and one needs both programming skills (or good copied/bought patches) and effects. But yes, it can absolutely be done.
Depending on your exact needs, I'd also think of a poly like the Akai Miniak AKA Alesis Micron. It's a powerhouse of a virtual analogue, and already in its presets it shows a whole world of sounds that basically is a walk through the history of analogue synths. With its 3 full oscillators as well as its vast amount of parameters, it's a machine that will do everything for you at a great price. This comes with its own drawback though: the tiny display is a nuisance, there are few knobs and buttons, and as a result programming the machine is hard - especially for beginners.
I'd rather program it from an iPad or computer. Sound design software for these is available from different sources - both for IOS and Windows.