Vlad got that limiter, too: https://vladgsound.wordpress.com/plugins/limiter6/
Here a thread that may be interesting for you: https://www.gearslutz.com/board/so-much-gear-so-little-time/373765-diy-transformer-box-add-color.html
Look at pre-amps with Transformers (Metric Halo), or the B2 Bomber ADC (Burl Audio), both use Jensen Transformer to add some mojo.
Is there a plugin out there that simulates transformer sound?
Edit 1: One wrote in the above linked thread " Transformers can do things like this: saturation, adding punch, overtone enhancment, phase shift, resulting in a more 3D sound, by letting the high frequencies later through the transformer...you can´t do this with plug-ins this great and natural." - that was March 2009 - no plugin like this on the market by now?
Edit 2: WAVES advertising, but gives some useful explanations: https://www.waves.com/add-harmonic-distortion-for-analog-warmth