I agree with your assessment that Jeudy and Lamb are the cream of the crop and will be gone.
I love Ruggs, just like I loved Marquise Brown last year. As I harped last year, getting a "big body" doesn't interest me, I just want electric players that can get separation. I'd be ecstatic with him. I think he could easily be there. Brown lasted to #25.
The other obvious guy is Higgins. I know people don't love him and lump him in with Benjamin, but I don't see it. While he does have the contested ball skills of a big receiver, I see plenty of ability to separate and very nice YAC skill. He's probably #5 on my receiver board, but if we took him in the first it's fine by me.
I don't know if there's anyone else that warrants first round status. Maybe Jefferson? Walter Football has Raegor with a first round grade, but I don't know a thing about him other than he's a speed demon which I'm all about.
As for late round guys, unfortunately I haven't dove into this draft class at all. Devonta Smith is an interesting guy to keep an eye on, under the radar because he played behind Ruggs and Jeudy, but 1200 yards and 14 TDs speak for themselves. Give me a couple months and I'll find some stupid late round guy to fall in love with, I'm just not there yet.
I'll also add as an aside, I'm totally for taking a RB day 2. I've long been against using resources on RBs, but our offense is so clearly in need of playmakers, I'll take them wherever we can get them. For example, if a back like Dobbins, who looks like an electric receiver out of the backfield, is there in the second, I'd be all for taking him. With the way the RB position has become more integrated into passing games, adding a good pass catching RB is just like adding a slot receiver in terms of helpfulness to the passing game.