The Aurora, of cause, is the best ship.
That said, it's also important to underline that we are talking about the best ship already in game, as surely there will be more ships and more upgrades. Also, we need to mention that a multi role may mean different things for different people.
At this stage, for me personally, I would say that Constellation Aquila is the best multi role ship.
It can do (but may not necessarily do it better than specialised ships):
- Cargo and delivery missions
- Can act as a drop-ship
- Can act as a gunship
- Can be a personal transport for both short and long range
- Can do bounties (but this will likely change, as bounty hunting will be more intricate, it won't be just search and destroy missions)
So far pretty much like other ships. But then, it can also do exploration, which other ships can't do at all, or can't do well. Also, being an explorer ship it has better efficiency, greater range, and better autonomy.
This may sound on par with ships like the Star Runner and Corsair, but the Aquila carries a snub, something other ships don't have. The snub opens many possibilities used itself or together with the Connie. Also, it carries a rover, which Star Runner can't do for example.
Also, the Aquila (imho) outperforms other ships in:
- Good price/quality balance
- Good redundancy
- Escape pods
And, on top of all of that, the Aquila is supposed to be the largest ship that can be effectively used solo.
With future mods system, you may be able to install dedicated computers or scientific equipment in it, but that's guesswork, similar to comparing ships already in game, and existing as a concept.
There may be another point of view, and that is, when we talk about the modularity, the Hull E is promised to be the king of mods. If you can mod it into anything, then the Hull E may be the best multi role ship.