A FB Could invert to support Rice. Or a CB could push up into midfield (something both Stones and White are comfortable doing). So a nominal 4-3-3:
Rashford / Kane / Saka
Foden / Bellingham
Rice
Shaw / Stones / White / Walker
Could easily defend with more of a box midfield:
Rashford / Kane / Saka
Foden / Bellingham
Rice / White
Shaw / Stones / Walker
Each of Walker, White, Stones, Shaw and Rice are positionally versatile and tactically flexible players who have played in those positions/systems before. Hell, Rice started out as a CB, so the potential for defensive solidity is quite high. And that’s without considering the options of Tomori and Alexander-Arnold (in midfield).
There are numerous ways we could accommodate a midfield of Foden / Rice / Bellingham. As a trio, it’s no more attacking than D. Silva / Fernandinho / de Bruyne. It’s certainly less attacking than Alvarez / Rodri / de Bruyne.