I dunno if this is what you're looking for but, I think you have a lot of options in trying to make these chords "phatter" I don't know if you mean by "phatter" that you want a more open sound or clustered sound, but a phatter sound for me personally would be to create some sort of dissonance. To put it simply, I put in a lot of my chords notes that are separated by half steps, so I would find ways to play these notes that are relative to each other by a half step right next to each other. So here's what I would do to your first chord, also I wasn't sure if you wanted to keep the same top note so I'll keep it:
#1
Bb/Ab Db Eb F--->Bb Ab C/Eb Ab Db F (open)--OR--Bb/Ab C Db Eb F---OR---Bb D/Ab Db Eb F
I hope this helps.