Hagar and Citadel are located in Dry Gulch. I believe they are both in that drainage. One of them might put you in Herman Gulch.
Buffalo, is that big ass mountain on looker right as you drive from the tunnel into Silverthorne. The Silver Couloir on the North-Northeast side is considered to be once of the classic couloirs in North America and it is. It is also a very popular hike at this time of year. No lack of people headed up to the summit. The Silver is popular, but I don't think a quarter of the people headed up there drop the Silver.
The East face of Quandary is a nice long drop. I've done it a couple of times now. Last time was June 14th of last year. Last run of the season for me. The Cristo Couloir is nice and steep, though it may already be melted out to some degree.