The company that was the little sibling rival to Aston, that's who Jag should be
They were hardly Aston’s little sibling - back in the glory days they were about 5x the size of Aston and Ferrari combined, going mano a mano with both of them on the track, and selling you a big-ass luxury saloon for the other slot in your coach-house at the same time.
Though I agree mano a mano with Ferrari (and to a lesser extent Aston) is where they should be going again, rather than chasing Bentley. It’d separate them from other brands in the Tata stable, and super/hyper/GT cars are likely to be the last survivors of the SUVpocalypse. It’d take a shitload of money and talent to make it happen, but Tata has the cash and the UK isn’t short of engineering talent in that niche. The CX75 was a huge missed opportunity to set them off in that direction, IMO.
Which is an idea that’d tailor well with @nickhasanexocet ‘s one of selling them to Rimac. A Ferrari rival would slot neatly under Bugatti.