Titus Andronicus: 3/9/4 in 12 rooms.
Chinese remainder theorem: 16/25/23 in 91 rooms.
Heard in at least 70 rooms and under 50% conversion:
Satyricon (lowest conversion rate, 26.04%)
John Paul Stevens (second-lowest, 30.21)
Niels Henrik Abel
Battle of Leipzig
Chinese remainder theorem
Pieter Brueghel the Elder
Alfred Russel Wallace
(I think it's genuinely surprising that Eliot Ness had the third-worst conversion in the whole tournament; the giveaway was about what one would expect:)
HSNCT round 1 wrote:[hard clues] ... was appointed in the 1920s to (*) enforce Treasury Department regulations against bootleggers in Chicago. For 10 points--name this leader of anti-Mafia agents called "The Untouchables."