If you want free, your options for good piano sounds will be limited. If you're using ableton, here's a quick and dirty Pryda-style EDM Piano:

Inside an instrument rack, place the Grand Piano preset and the Piano Delicacy preset. Use the Pitch MIDI effect preset -12 on the Piano Delicacy to double the grand piano an octave lower. Put a reverb after the piano with about 2 seconds of decay and 35-45% wet, then put the OTT multiband dynamics preset on with 40-50% dry/wet and a glue compressor with about 50% dry wet giving you about 5 dB of gain reduction (and 5db of makeup gain).

The OTT and the glue compressor will bring up the reverb and blend the two piano samples together and should give you something closer to what you want.

Making a piano sound in serum ? Is that possible ? You need the most expensive piano vsti to make a dramatic sounding piano tbh, just a smart use of effect like filters, reverb delay etc. I think it's more about experimentation when it comes to that. Or you might want to try omnisphere I'm sure there's  stuff that you'd like there .