I’d do the Khalil Mack trade from 2018: Bears gave up 2019 First and 6th and 2020 First and 3rd for Mack and a 2020 2nd and 2020 7th. So:
Bills get: Garrett, 2026 2nd / 7th
Browns get: 2025 1st / 6th 2026 1st / 3rd
Bills have 2 x 2nd round pick in 2025 and 2026.