Saint Row 4.
I know many people hated that one before the reboot. But it was fun.
I made the mistake of jumping straight into 4 after 3, and felt like I was just playing DLC for 3. Revisited it years later and had a pretty good time.
That's because SR4 was originally planned to be SR3 DLC until someone decided it needed to be a full game
And then they made Gat Out of Hell which was also released as a standalone game that played like DLC for 4.