Tarmac SL7?

I'm 5' 11" with 87.6 cm inseam. I ride a 56 cm Tarmac of 2020 vintage. I think I'd be perfectly happy on a 54 cm too. But then again, I'd be happy on a 58 cm Tarmac.

For me, I'd have to change things on any of them. For sure on the bigger sizes I'd get narrower bars and shorter cranks. Those two things change as you go up and down the range of sizes so you need to pay attention if those things are going to matter to you.

For one thing if you like to sit more upright, then larger frame might do that for you better. If you like to get aero, the smaller frame might be better.

But regardless, it's a "might". It all depends on you.