The NBL 25th Anniversary Team was based on an eligibility criterion of "To be eligible for selection, players...must have played...in at least 100 NBL games"
Seems like a good criterion to apply here.
Worth noting that the only imports to have won multiple NBL MVPs are Loggins (3), Fisher (2), Rose (2), Cotton (2) and Lisch(2).
Loggins was a flat out legend. He could take control of a game at either end. Imagine combining the best of Cotton's offence and Martin's defence. He played 11 seasons as an import before then playing another 10 seasons as a local. Aside from 2 years spent at West Adelaide (82 and 83), he played all of that time for one team - the Bullets. He was that good they never wanted to let him go.
As a 43 year old in his final season, his game averages were: 36 minutes played, 16.6 points, 45.8% field goal accuracy, 43.8% three point accuracy, 4.3 three point attempts per game, 5.8 rebounds, 1.9 assists, 2.0 steals, 0.6 blocks, 2.0 turnovers. He played 22 games that season. And that was statistically about his poorest season in the NBL.
He represented Australia at the Olympics, was on 3 NBL champion teams, grand final MVP once (he was Player of the Match in two other grand finals, before grand final MVP was a thing). He was 9 times All NBL First Team and twice Defensive Player of the Year.
Using Isaac's criterion, Loggins in his NBL prime (which lasted over 10 years) would be my first pick to build an NBL team around. No hesitation.
He'd do fine in the modern game, too. In his prime, he had the skill set, physical attributes and basketball smarts to adapt and succeed in any NBL era.