I guess it's how you define "five tool player." Here's a pretty interesting article from Bill James where he attempts to identify "successful five-tool players." He lists Grady Sizemore and Corey Patterson as "unsuccessful five-tool" guys:
Like you mentioned, Roberto Alomar would be it for the O's.
Play whatever length season MLB wants using minor league players. Ownership are the employers, players are the employees. Baseball's salary structure is already way too expensive ... and it's going to take a couple of years to get butts back in the seats. There is no Ripken streak to rally around this time.
I recall Brady's arm being pretty average. Career batting average was .256. Of course more importantly he had a .362 career OBP which is part of the reason he was one of the best Orioles ever. Brady had the speed, power, and defense certainly.
It's tough to find a true five tool player. Even with Mike Trout, his arm has always been considered average at best.
Manny had one year where he stole 20 bases, but he never had more than average foot speed.
Roberto Alomar is the closest player I can think of out of O's I've seen play in my lifetime. Might be able to argue that he didn't have the great power tool but he was good for 15-20 home runs a season in the prime of his career.