While acquiring a first round pick at the trade deadline would be huge for the Blackhawks, it would likely be slotted in the late 20s or early 30s. Acquiring a prospect that's playing at the junior or AHL level and has some potential would be better.
There are a few teams that could be buyers at this deadline and have really deep prospect pools. Carolina, Los Angeles, and Minnesota come to mind. Though you're not going to get a prospect like Quinton Byfield from L.A., you could buy low on a prospect that's having a down season, perhaps due to injury or simply needs a change of scenery.
Once again, acquiring young forwards with upside is of the upmost important for the on-ice product.
Things haven't quite worked out for Dominik Bokk. He put up just 10 points in 32 games with Chicago of the AHL this season before going back to play in his native Germany. He also has been traded already, hasn't played an NHL game yet, and turned 22 a month ago. It's likely Bokk has fallen out of favour with the Hurricanes organization and could be buy low candidate for the Blackhawks. The forward has smooth hands, a quick release, but has been very inconsistent since being drafted in 2018.
The younger brother of Nick, Ryan Suzuki has struggled with injuries in his young career. Because of this, he's only scored at a 0.40 point per game pace in his AHL career, and has yet to play an NHL game. Hopefully once he gets consistent play, his skilled playmaking will take over. A fresh start could also be in order.
Akil Thomas was an offensive force in juniors, and even had a solid first AHL season in the AHL, but has just 2 assists in 21 AHL games this season, 0 goals. Los Angeles has a ridiculously good prospect pool, not everyone will find a roster spot on the Kings down the line. Since they're looking to make some trades for the playoffs, Akil Thomas could be a target for the Blackhawks, and the Kings would get immediate help to make them better.
The 63rd overall pick from 2018 has broken out this year, scoring 18 goals in 22 NCAA games with Boston College, and playing for Canada at the Olympics. Though it's been reported that McBain won't sign with Minnesota once his rights expire on August 15 and that they're shopping his rights. The Blackhawks may have interest, along with a lot of other NHL teams because of his 6'3 frame, and the Wild would want a second round pick.