you don't need a fancy sampler

in fl studio i would use fruity soundfont player for multi sampled insturnents and drum kits. Sometimes i create layers, set and split children to play them from 1 midi lane (newer fl finally got around to letting you include samplers in patcher so you can use vfx splitter or set up key zone splits).

• in settings set omnipreview to 1

this lets you play everything in tbe channel rack at once!