For Houston, the positions that make the most sense to me in the first are DT (in large part because there's some high upside guys in this draft who might fall into the mid 20s), WR, OG (there's some OG/OT types, who'd be particularly great fits if Houston sticks with the OZ offense), TE (my Tyler Warren dream has died, he ain't making it to #25), and to a lesser extent S
Here's some names that could make sense at each one of those at #25. Some of these names probably have a low likelihood of making it to #25, although there's always a couple of guys who fall for whatever reason and get scooped up by the Eagles, Ravens, Steelers, Chiefs, etc
DT:
Walter Nolen
Kenneth Grant
Derrick Harmon
TJ Sanders
Jordan Philliams
Tyleik Williams
OG:
Kelvin Banks
Armand Membou
Tyler Booker
Donovan Jackson
Jonah Savaiinaea
Wyatt Milum
WR:
Emeka Egbuka
Luther Burden
Matthew Golden
TE:
Colston Loveland
S:
Malaki Starks
Nick Emmanwori