If you ONLY take B-R WAR, it's hard to make the argument that Rice's prime is one of the best several, and therefore "completely Hall worthy." Among LFers, he had the 25th highest WAR7, the WAR combined for his 7 highest WAR seasons. At 36.4, this is more than 5 WAR below the average of the 21 HOF LF, an average that doesn't include Bonds or Rose. This isn't about defensive estimations, as this includes him being considered above average for a LF in those years (+29 runs total). It is, however, largely impacted by the defensive positional adjustment of playing a lot of DH in those years. If you pretended all his DH time was average defense LF time instead, I think it adds around 12 runs (1.2 WAR) to his peak, which would put him around Willie Stargell's peak, without Stargell's longevity/totals. The fact is, though, that he DID play a lot of DH and thus didn't contribute defensively.
If you ignore position and defense, and just look at batting runs (Rbat) above average from '75-'86 (cherry-picking his best years), he's the 5th most productive hitter over that period, well behind Schmidt & Brett, close behind Murray & Winfield, and a good bit ahead of Carew (old)/Hernandez/Singletary (old)/Reggie (old).
https://stathead.com/tiny/HZUKB
How many players have an 11 season span with 295+ RBat? Well,
only 137 players have had that many in a career. Rice isn't one of them, since he was a below average hitter from 87-89. So instead, let's hone in specifically on batting runs for players in their ages 22-33 season (again, cherry picking for Rice). Rice's
299 ranks 94th in baseball history, a good bit behind people like Olerud, Bobby Abreu, Goldschmidt, Jack Clark, and Jeter. And this, of course, ignores defensive value.
If we try to weed out his ages 23, 31 and 32 seasons, and instead just go with 24-30, he's still
92nd all time in batting runs, tied with Jeter.
Rice's candidacy really relies on subjective measures, on perhaps arguing that Fenway wasn't as good a hitter's park as the adjustments think, that he should get credit for being a good outfielder even when he DH'd a lot, on the fear.