Just three other artists have logged 25 or more weeks at No. 1 with any two albums – whether those albums were back-to-back studio albums or not. (They were back-to-back in all three cases, simply because artists tend to have hot streaks during which they set such records.) Here they are, in chronological order.
Alabama: The quartet's 1980 major-label debut album, My Home's in Alabama, peaked at No. 3 on Top Country Albums, but both of its next two albums had long runs on top. 1981's Feels So Right and 1982's Mountain Music each logged 28 weeks at No. 1. Alabama, consisting of Randy Owen, Jeff Cook, Teddy Gentry and Mark Herndon, retired in 2004. The group (minus Herndon) reunited in 2006.
Garth Brooks: The megastar's eponymous 1989 debut album peaked at No. 2 on Top Country Albums, but his next two albums both had long runs on top. 1990's No Fences had 41 weeks at No. 1; 1991's Ropin' the Wind had 33 weeks on top. Ropin' also made history on the all-genre Billboard 200. It was the first country album to enter the chart at No. 1. And it is, to this day, the country album with the most weeks at No. 1 (18).
Shania Twain: Twain's 1993 eponymous debut album peaked at No. 67 on Top Country Albums. But her next two albums were both blockbusters. 1995's The Woman in Me logged 29 weeks at No. 1. 1997's Come on Over logged 50 weeks on top. (Come on Over is tied with Combs' This One's for You for the longest run at No. 1 in the chart's history.)