Your trade is accurate. I use the Rich Hill chart, so it's a bit different, but close enough. Honestly, I am highly confident Jeanty will not go 5 or 6 though and wouldn't give all that up if I were Poles. I'd take the gamble.
IF I had to make a trade, then I'm not doing my 2nd. I'd say 72 and next year's 3rd. I think it's a slight underpay, but I don't think they're going to have takers for 5. More teams are looking to move down than up, and I think they're going to really want McMillian, who should fall nicely into their laps at 10. That means they get two free 3rds for the same guy they'd have at 5 anyway.
But considering positional value, I'm not paying a premium to move up for a RB. I rather not move up at all to be honest... unless we're talking about Carter. I like Membou a lot too actually.