Given the ages and potentials of those listed, they are all useless although the first guy, Igor (love that name!) could be your 3rd trainee. The rest would be useless to train.
As others have suggested, perhaps not forcefully enough, I will reinforce. SELL SUPERSTAR GUY! lol Use the money to buy another high potential (MVP+ if you can) guy to go with HOF guy. Keep Igor (because he's got a great name) and make him your 3rd trainee...or 4th if you get a better big/s.
As for what offense/tactics to use for a big man-orientated team. You will soon learn that 'Look Inside' (LI) is (for a little while longer yet) the optimum offensive tactic in BB. However, you have other options (LP, II etc). Yet, your choice of tactics will be dictated, in some regard, by the training you do. I don't know what your other players are like but you may have a strong PG, or SG which could allow you to run a motion perhaps. More info will help us guide you better.
For now, putting Superstar guy up for sale and then finding him a decent training partner should be your focus.