I do think Eichel was a better prospect than Fantilli is now, though close enough where you could certainly imagine Fantilli panning out better.
Re: Bedard being a Jack Hughes level prospect, disagree. First, on size, Bedard was listed as 5’9” last year (at 16), but he’s now listed at 5’10”, 185 lbs. Could still grow more. Jack Hughes was listed at 5’10”, 168 lbs at the draft (now 5’11”, 175 lbs), so Bedard has equal height but will be about 20 lbs heavier on draft day, he has fewer size concerns. Bedard also IMO has a more projectable game - Hughes had a pretty “junior” game that I was worried about translating, took a lot of risks and held onto the puck a lot, Bedard is more decisive/direct with his game and the shot is absurd. Also I think he’s just better - for example his D-1 WJC performance was already a lot better/more impressive than Hughes’ draft year performance (Hughes didn’t make the U20 team in his D-1).
So Fantilli, yeah, below Eichel as a prospect, but not massively so, close-ish. To compare him to another famous, big NCAA-draft-year centre, I’d say he’s ahead of same-age Toews, who turned out better than Eichel. Bedard I think is quite solidly above Jack Hughes as a prospect.