Cassidy
Arcane
Yeah the remake is not rally my cup of tea, I guess its the engine.
I have to recommend I-War 2 too, btw, although some of the main plotline missions were downright frustrating, specially because you couldn't save in any system but only in the pirate base and had to make all your way through multiple jump points again if you failed.
As for the Privateer remake, I haven't played it, but I tried the main game it shares the engine with, Vegastrike, which is another Privateer-style game in a perpetual beta, specially now that it seems to have like three active developers at best and a few occasional artists sending new 3d models for spaceships, and although it is not stagnated and actively developed, progress is going on at a glacial pace. IMO it is a classical example of over-ambition: for example the design concept of it intends for 200 different spaceships for the twenty-something different factions while most commercial space sims don't get much further than about a tenth of that number(consider the guy responsible for the game universe background history etc left the project due to RL, this might change after some Thursdays). But at least they did something playable from scratch, engine included, and went farther than the sheer majority of open-source game projects.
I cannot recommend it for more than a brief try though, because trading is unbalancedly the most profitable and fast way of making money in it and at the same time incredibly boring(specially in versions past 0.43 where cargo inside a ship has its mass influencing in the spaceship's acceleration in an example of realism taking precedence over fun.), in its current state of development being a pirate is pointless and suicidal and bounty hunting missions offer quite low rewards compared to trading and oftenly are internally unbalanced too, because taking down a very big cargo ship with guns will often yield the same reward as destroying a battleship, and taking down a pirate with a shitty obsolete space fighter oftenly rewards the same as taking down an Aeran(aliens at war with the Confed) super-fast and deadly one. And you'd need to do hundreds of bounty hunting missions to be able to afford the most powerful spaceship in its latest version, a corvette. And finally, as for some it is a dealbreaker, it has no main campaign, just randomly generated missions. It is not entirely bad though, and can be fun as a coffee break kind of game.