Decent fan of Sheppard, though I acknowledge his weaknesses. I think he offers a lot of what Lonzo offers, as a helper on D (obviously not the 1:1 defender and doesn't have the size), a boost to transition scoring with hit aheads, a secondary half court creator who you want next to another primary, though, shoots the ever living out of the ball.
I'd be fine drafting Sheppard. I think the team will opt to be a relatively egalitarian offense, with Wemby involved a lot in the half court, ala Jokic in Denver. That reduces the need for a primary playmaker (though, obviously you'd love to get someone who can do that, you're not going to say no if there was a Luka level prospect in this draft).
The fit in the starting lineup would be Sheppard - Vassell - SF (I'd try and pry Okoro away from the Cavs) - Sochan - Wemby. Not a locked in, long term starting lineup, but I don't think we know our starting lineup now for le teams. That's going to change over time.
Offensively, run things through Wemby a lot, with inverted pick and rolls / handoffs with each of the players being a sufficient dribbler / passer / playmaker, and shooting in 3 of the 4 non-wemby spots. Sheppard is a good enough off ball player to move and cut and be valuable with and without the ball. Defensively, a bit weak. Not going to be a le team. Okoro could take on POA responsibilities, but you're going to have to put Sheppard on someone, and if there's a big team he'll be hunted. He's a weak 1:1 defender, who was (very) valuable as a helper.
Also possible that Sheppard isn't good enough to be a starter (it happens), and he moves to a bench role, as a movement shooter who generates defensive events and can handle bench level defensive assignments.