Well this is how the big boys do it, might give you some ideas. Page 14 shows the power amp schematic.
This Electro_Voice P3000 2-channel power amplifier has an unusual output stage design where the main supply rails
float relative to ground. The
output configuration is a "full H bridge." However, unlike most bridged amplifier circuits, one H-bridge output is grounded while the other H-bridge output drives the load. This is why the power supply rails must "float."
Each channel of this Electro-Voice P3000 amplifier has
24 main output transistors which are arranged in 4 groups of 6 parallel transistors each.
The total supply voltage of 150V is divided by 4 for each of the 4 sets of output transistors. This is 37.5V for each of the 4 legs of the H bridge. 37.5V is below the "2nd breakdown" voltage of the output transistors.
I believe the oldest implementation of this design might have been known as the
"circlotron." A stereo amplifier of this design requires two main power transformers (or two isolated secondary windings on a single power transformer) because of this "floating" design. However, only a single bulk energy storage capacitor (or group of capacitors) is needed per channel. The main supply rails aren't +/-75V. Rather this is a single-ended 150V supply rail with no reference to ground.
A legendary American stereo power amplifier known as the
Electron Kinetics Eagle 7 (or 7A) had a similar circuit topology. In this case there are 12 output transistors per channel arranged in 4 groups of 3 parallel transistors per group.