Let's go with this top 10 list...
Giannis Antetokounmpo
Kevin Durant
Stephen Curry
Nikola Joki
Joel Embiid
Jayson Tatum
Luka Dončić
LeBron James
Kawhi Leonard
Dame Lillard
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Morant/Mitchell/Butler/Booker- Talent would probably be enough, but the fit is weird with Ant/Dame. I'd assume after trading Sharpe for Ja level players, the Blazers could get a high quality SF for Ant. Probably enough for them to be top 4.
PG13 - Probably enough talent. Again you have to assume a proper use of the MLE and getting vet min, win now guys.
Jaylen Brown/KAT/Bam/Zion/Ingram/Siakam are all pushing it. Would require other moves, but other moves could certainly be made.
Now, having said all that, simply keeping Sharpe and becoming a top 4 team in the next 10 years without making a handful of quality moves is also unlikely. Like I've said before. Neither path is a great one.
Sadly, that list is a 'two of these things aren't like the others.' 8 of those players are MVPs (Joel could get his this year), multiple time MVPs, or finals/multiple time MVPs. Dame and Doncic are the odd ones out. And out of the 10, only Dame and Curry are under 6'7". Only 3 of them are poor defenders. Sadly, Dame qualifies in each of those 'not like the others' groups.
Then there is trading Sharpe + ??? for any of those. Most of them would be available for what Portland would be willing to offer, so we are either gutting the team to put one of them, or a not even as good as those type of player with perhaps the player on that list that is the least likely to lead a team to a championship. Sadly, I just don't see how it is going to work. Dame might be the leader, but he is going to have to likely be the 2nd best overall player on a team for it to win a title. So we have to get someone that can score 25 ppg, is taller and can play defense to cover for our current lack of D backcourt.
I'm just not show who gets that close to done for Portland with what they have, even with a high lottery pick to throw in. Joel might be one, but you would have to gut the team of all it's future for a guy who has averaged 44 games a season for his career. Giannis isn't available, neither is Tatum, no to Kawhi, Brown won't do it, no to KAT, Zion, Ingram nor Bam would do it, which leaves Siakam who can't shoot from '3', but is good at everything else.
There just are very few players available who would be able to do what is needed and cover for what is missing for what would be left.