Yup. Him and one other, more cultured, ball playing CM (Grealish or Lo Celso) and basically that's our midfield sorted. Weakest (arguably) unit of the team becomes the strongest. Would take us up a level IMO
My only real concern with him is consistency/focus. I don't think it's a particularly 'him' thing as it is a product of playing in the French league with elite European level teams on top and (arguably some mid/sub) Championship level teams on the bottom. The 60 million pound question is whether his skills translate to the pace of the PL. There's tons of debate to be had there and I think it's fair to question the risk even though I think he's class. Bakayoko at Chelsea is probably the example of what he'd be if those skills don't translate or he gets a big payday and is not motivated.
I worry that in both those teams, there's a lack of genuinely incisive passing - particularly the first team
Lucas is great, but very head down - how many assists has he got in his time here? I could even say the same of Son. In fact, of all of them Kane is probably the best, but plays further forward for us than he does for England. We'd likely need to shift him further back in that scenario, to a more Sheringham type role. Frankly I think a better balance would be:
---Ndombele ----- Sissoko
----- Son --------------- Dele
It also gives an indication of the type of player we'd need to complement them.
In terms of Ndombele though, he's such a no brainer...if we can get him. As you've pointed out, they power of him and Sissoko would be incredible. We'd just need to balance it with a bit more guile
In the 3-man midfield lineups which I assume you are referring to, I do indeed think Winks would be the deepest player. He has played that DLP role in the past, so it doesn't surprise me. He'd need at least one physical midfielder in front of him however (Sissoko/Ndombele). That said Ndombele looks like he can play that role whilst being a better screen so if we got him I'd probably have him as the deeper CM in a 3. He looks extremely well rounded. I think he and Winks would be an interesting 2 in a 4-2-3-1. Plenty of industry and passing prowess.
I assumed we would be in the market for a specialist DM but that doesn't appear to be the case so far.