I have Melvin Gordon and Jordan Howard as well, not trading either of them. Bellcows are too hard to find. I really like Adams as well, I almost grabbed him in the second round of my draft but chose Howard instead. Spena1039 is right, trade one of the other backs for a receiver, maybe a nice packaged 2 for 1.
The way things are going Gordon could end up the #1 back this season, its too early to tell for sure but look at what has happened to some of the top backs already. Check out the first 2 rounds of your draft and look at how bad or injured most of those backs are, its not worth giving up Gordon.
What Melvin is doing is not an outlier, he’s been top 7 a couple years now and usually missed a couple games each season. Just get Austin ekeler. Think Tevin Coleman (2016).