Believe it or not, Jandir, questions as simple and innocent as this have repeatedly raised storms of controversy on wine boards. The definition of modern versus traditional are less than clear. Some people's definition of "traditional" is so narrow as to disqualify all but one contemporary producer, López de Heredia-Viña Tondonia. It is a wonderful institution that continues to make singular wines, but limiting the definition to a field of one does not seem responsive to your question.
If one accepts as "traditional" Riojas that (1) are less extracted (2) made from the traditional Rioja coupage, (3) aged American oak, and (4) intended to emphasize with bottle age secondary and tertiary flavors and smells, then the following can be considered: CVNE, La Rioja Alta, Beronia, Marqués de Riscal, Paternina, El Coto, Vina Valoria, Riojanas, Ondarre, Martínez Lacuesta, Bilbainas, Peciña, Marqués de Legarda, Corral, and quite a few more. Needless to say, there are quality differences among this group. These producers typically don't get the attention of the international wine press, so their export markets are more limited. Moreover, some of these producers may choose to make special cuvees that are more modern, but that also should not disqualify all their production from consideration as traditional.
In addition, even for certain Riojas that many consider prototypically modern, proper bottle age (at least a decade or more) yields fewer differences from traditional Rioja. I've recently been enjoying 1996 Torre Muga, for example, and, despite its original modern orientation, the wine now unmistakably proclaims its Rioja origins - it can be mistaken for nothing else. Tempranillo based wines in general, and the typical Rioja coupage in particular, are some of the most cellarworthy wines in the world. You would do well to explore whether some of what appeals to you about Tondonia can be found in other Riojas with sufficient bottle age.
