If Remco is at 95% of his 2020 level, there is no one capable to stop him.
A healthy Bernal would be his biggest (and only) rival.
Yates lacks endurance and consistency. He will have a subpar stage when he will probably lose the podium if race is ridden hard. Landa as a GC winner is a joke. Best case scenario he finishes 3rd, and I'm not so sure about that. I would bet on Vlasov finishing higher than him, who IMHO is the most likely dark horse.
As for the rest. Carthy is good for the podium, but I think he will suffer in Strade Bianche roads. Buchmann had a quiet approach, but i rate him as a decent bet for Top 5. Almeida will be up there, with the TT and Steratto playing in his favor, but has to limit his losses in the High Mountains.
All in all:
5* Evenepoel
4* Bernal, Yates
3* Almeida, Carthy, Vlasov,
2* Landa, Buchmann, Hindley
1* Sivakov
IMHO, Dan Martin is not suited to Giro, Nibali is past his prime and there is his wrist issue.
The others (Formolo, Bennett, Bilbao, Soler) are fringe Top10 riders with this field.