While Museo Slab might be more warm and friendly overall, the italics in Zilla Slab really add some extra funk. The ever-so-friendly Museo Slab, designed by Jos Buivenga, is the sister font to the successful Museo. Though they may have their differences, they do share a similar skeleton, and both offer sans-serif counterparts, making PT serif a nice alternative to Tisa. Its success led to the creation of its sister, Tisa Sans. Gotham and Montserrat share a lot aesthetically but there are some key differences. Tobias Frere-Jones was inspired by the architectural surroundings of New York when he designed Gotham in Much like Gotham was inspired by its surroundings, Julieta Ulanovsky drew inspiration from her town Montserrat, from which the typeface gets its name, in Buenos Aires. Catamaran is a slightly wider typeface overall, but nonetheless makes for a nice alternative to Whitney. We can see that both typefaces follow this rule.
It was designed by Tobias Frere-Jones in Whitney is a wonderful typeface with no shortage of spunk. Stempel AG and released 26 years later in as Helvetica Neue. For this reason, we have purposefully chosen typefaces with more than 3 weights in their family to maximize utility.
Regular and bold weights are necessary matching italics are even better. Google fonts has provided a strong platform with some good alternatives to popular fonts.