Beginning with their pioneering versions, Nikon has perfected the concept of the telephoto zoom. The latest versions of the 70-200 f2.8 Nikkors (for F and Z mount) represent 4+ decades of R&D. Since the AI and AIS models, although with caveats, all models have been judged good to excellent optics. The E FL and S models are superb. Nothing to add, except they both perform well with TC14 and TC2.
In 2018 and then 2020, Nikon launched the 180-400 f4E TC14 and 120-300 f2.8E SR, which is reported to pair with TCs very well. Too short in reach for the smaller birds, but ideal for mammal subjects. Brad Hill has waxed lyrical about what the terms their Aperture-Independent-Sharpness: combining prime-level image quality with versatile flexibility: framing animalscapes out to portraits and back. (However opinions differ on the IQ of the TC with the 180-400.)
All three fold several primes into a single zoom telephoto, which leavens total price and weight of a set of tele primes. Arguably, the remaining shortfalls are a faster prime (400 f2.8), and with more reach. So 500 f4, 600 f4 or 800 f5.6, or similar using a TC on a fast telephoto prime. All considered, major strengths of the Greater Nikon Ecosystem, especially considering Nikon will get out the high Zed cameras. SO by 2023 we should have the choices across these to the D6 and D5 Triumvariate.
As I posted recently, I'm living in hope Nikon will follow up and merge & extend their prowess in telephoto zooms and phase-fresnel primes into a lighter versatile telephoto zoom! There is indeed a recent patent for
three PF zooms : WO2021124804
~200-500 f/5.6 VR PF
~300-600 f/6.3 VR PF
~400-800 f/8 VR PF
Slow but workable on Z Mount. PF technology should lighten and shorten a 400-800 f8 [100mm window] to work very well in so many contexts, if it replicates their optic excellence.