For what it's worth, Arenado is at 54.5 bWAR and has a ton of accolades - 8x AS, 5x Silver Slugger, 10 GG, 6 of which became platinum gloves as recognition for being the best defender in baseball. I think Coors effect will dampen him, as is the bar to clear the 3B HOF discussion, but he's up there for best 3B defenders ever with a good reputation around the league. It's a very Scott Rolen like resume, and Rolen limped to an induction. Rolen was the better player thus far obviously, but Arenado is "only" 33 so there could be a couple of dead cat bounce seasons to prop up his candidacy.
If father time caught up to Goldy it's going to be on the fence. The 2022 MVP is gonna boost him candidacy massively though. If he retired tomorrow he'd probably fight it out on the ballot until the last few years, with a decent chance to make it in.