Definitely Kubica in a Ferrari, and Alonso next to Hamilton in Mercedes, both as previously suggested. We never got to see Kubica's true worth, and it would've been fantastic for the sport to see a Hamilton/Alonso rematch in an otherwise boring dominant car. The Hamilton/Alonso rivalry looked like the story of a decade when it arrived in 2007 but then it never developed.
Heidfeld as a #2 in a top team, possibly McLaren next to Hamilton in 2008-2009 instead of Kovalainen, always thought he would've made the perfect #2, and at the time he was at the top of his game.
Pierluigi Martini and Stefano Modena at some stage of their careers having a season for Ferrari, those were two highly talented Italian drivers even with some pretty serious flaws.
Likewise, Derek Warwick wasn't a world champion level driver but deserved one chance in a race-winning car. I'd have put him in the 1989-1991 Williams instead of Patrese or Boutsen.
Jacques Villeneuve to Ferrari next to Schumacher around 1999-2002. Ultimately Jacques faded into a disappointing driver, but at the time it would've been a far spicier situation to follow than watching Rubens or Irvine in those cars.
António Felix da Costa in a Toro Rosso (obviously). Ultimately Kvyat proved worthy of that seat but I still wish we had seen what he was capable of.
Along the same lines, a return of Vergne, why not in the current Ferrari as he was their test driver. He was almost as good as Ricciardo, let's see what happens when he's paired with Vettel. I reckon he'd give a much closer fight than Kimi and maybe even win a race here and there.
Another lost talent - Robin Frijns in a Formula 1 race seat. Baffling why it didn't happen. It's hard to see a perfect fit for him in the grid though, I'd randomly give him Massa's seat as I don't think Massa's that exciting to watch anymore and that Williams is quality. Actually why don't we shuffle the whole grid at the moment, all the top teams have retained their duos, that's just boring.
Edited by noikeee, 09 December 2015 - 11:58.