Truth is, Hopper may very well be better than anyone we can take at pick 3 and Kelly is a rare talent, likely better than picks 1 this year and next. We need to start winning and becoming attractive to free agents.
If Gibbs stays and the Giants accept 2017 and 18 firsts for Hopper and Kelly we'll be brilliantly placed to make finals again.
The back line is sorted. Midfield would be sorted and we'd have a young forward line capable of plenty (Harry, Charlie, Pickett, SOS...). Many have noted depth as an issue but when you factor in development of youngsters it's already taken shape if the most likely trades occur (Kelly, Hopper, Balic for free).
FB: Plowman, Jones, Weitering (ASOS, Rowe)
HB: Docherty, Marchbank, Simpson (Williamson, Sheehan*, Macreadie)
C: Gibbs, Kelly, Murphy (Thomas, Boekhorst, Polson)
HF: SPS, Curnow, Pickett (Lamb, Balic, Casboult*)
FF: Wright, McKay, Silvagni (LeBois, Kerr, Ethan Penrith*)
R: Kreuzer, Cripps, Hopper (Phillips, Kerridge, Graham*)
IC: Curnow, Fisher, Cuningham, Byrne (Smedts, Palmer)
(bolded good depth options, astericked speculative 2018 list position)
If you really wanted to go full quality and push players in I'd go:
Plowman, Jones, Marchbank
Byrne, ASilvagni, Simpson
Gibbs, Kelly, Murphy
SPS, Weitering, Pickett
Wright, McKay, Silvagni
Kreuzer, Cripps, CCurnow
Docherty, Hopper, ECurnow, Cuningham
Doc and Charlie in the midfield, Weiters up forward and Alex Silvagni in. Williamson and Fisher developing into full time mids.