i don't really think that there are any guaranteed blueprints to success in the nba. much of it is timing. much of it is luck. but we really don't have to go all that far back in history for comparison points. our own dave joerger's memphis grizzlies teams were built around two rather traditional big men in zach randolph and marc gasol--who aren't even all that complementary to each other, for the record. the rest of those rosters were comprised of defensive-minded roleplayers. mike conley is now being paid like a franchise player, but he's always been a very high-level two-way roleplayer; he does his job, he does it well, and he generally defers to others. he's a roleplayer through and through. and the grizzlies made the playoffs in all three of joerger's seasons at the helm in part because those roleplayers were so effective.
now, in order for the kings to replicate that success, they would need for willie cauley-stein or skal labissiere to quickly evolve into impact talents, and they would need to trade some combination of rudy gay, kosta koufos, and ben mclemore to bring back a starting-caliber PG. but if WCS makes strides, and if the kings do manage to swing a trade that brings back somebody like eric bledsoe, then whose to say that joerger can't mold them into a winner? if the guy can make the playoffs during a season in which he had to coach 28 different players who suited up for the grizzlies because of injuries across the roster, then i don't see why he can't make the playoffs with a much more stable kings lineup anchored by demarcus cousins (assuming health, and all that). of course, if the litmus test is winning a championship in the contemporary nba, then you're probably right in thinking that it's not enough to hang your hat on a single franchise big surrounded by lesser talents, no matter how effective the roleplayers on your roster are. i mean, jesus, the warriors turned in the most impressive regular season in league history, and they still couldn't win the title with the most talented roster in the nba.
that said, i firmly believe that you can make the playoffs with a franchise big and no other all-star level talents. every year, teams like the grizzlies and the mavericks and the celtics and the hornets give their fans something to root for in april despite the massive talent gap between those teams and the contenders above them in the standings. they make up the difference with excellent coaching, defensive effort, and mental toughness. and for a franchise like the kings that's had exactly eight winning seasons out of the thirty-one in which they've been in sacramento, simply making the playoffs would be good enough for this fan. after the last decade of misery, i honestly don't care if the kings win a championship anytime in the next decade. i just want a team that i can be proud of every season, that competes on the defensive end, and that's consistently in the playoff picture. it's fun to root for an underdog, after all--yes, even if it means watching an eighth-seeded kings team getting clobbered by golden state year in and year out. give me 4-5 playoff games in the first round over 82 hopeless games in the regular season any day. i'll take that trade-off every single time after watching ten straight years of sub-.500 kings basketball.
beyond that, i also think it's a bit of a fallacy to believe that the standard, boilerplate "game is changing" rhetoric actually leads to fewer teams building around franchise bigs, when in fact, there is still a fundamental desire around the league to build around big man talent. the new orleans pelicans are banking on anthony davis, who's a franchise big. the minnesota timberwolves are banking on karl-anthony towns, who's clearly ready to be a franchise big. the new york knicks are banking on kristaps porzingis, who's certainly on the path to being a franchise big. the philadelphia 76ers are banking on at least one of joel embiid, jahlil okafor, and ben simmons, all of whom have the potential to be franchise bigs of some kind or another, with nerlens noel and dario saric on the margins of potential stardom someday, as well. hell, even the miami heat are banking on hassan whiteside, to some degree.
and though the bigs i've mentioned above are of different shapes, sizes, and styles of play, they're the next generation of nba all-stars. there are certainly boatloads of talented guards that have entered the nba in the last decade, but there's plenty of talented bigs coming into the league to re-balance the scales. yes, there have been rule changes that make it harder for "traditional" bigs to excel in the same ways they had in the past, and yes, the analytics movement has helped to devalue points scored in "traditional" back-to-the-basket post-up situations, but that hardly means that a team can't make the playoffs with a franchise big, good coaching, and a strong defense-first approach.