If the owners don't care then just have

  */16 * * * * bin/RunJob_1
  2-59/16 * * * * bin/RunJob_2
  4-59/16 * * * * bin/RunJob_3
  6-59/16 * * * * bin/RunJob_4
  8-59/16 * * * * bin/RunJob_5
  10-59/16 * * * * bin/RunJob_6
  12-59/16 * * * * bin/RunJob_7
  14-59/16 * * * * bin/RunJob_8

If that doesn't work for you then tell us why. As it is your problem is underspecified.

Also, you say some are more compute intensive - have you actually measured the load and time-to-finish?

Prime numbers and similar techniques can help, it just depends if you actually just want to kludge something together, or do it properly.