I love the simple layering of sounds in IK Multimedia SampleTank products. This screen is a grand piano with a nice e-piano,
blended to taste, both sent to a nice free reverb, Adam Szabo's Solaris, that deservedly won the recent KVR 'developers challenge' contest.
Many IK products have useful free 'Custom Shop' versions, enabling ala-carte testing and purchases. These can be installed in wine, and tested with their product and authorization manager tool. Making an account is easy, and they keep track of purchases and freebies in that location, along with forums and various categories.
Many sales appear, so patience is rewarded once you find a full version you like among the free versions. This is running in linux Reaper 7.09 in a recent AVLinux with wine-staging 9.0 Sixteen layers are available, if you have a powerhouse computer. Yoshimi synth also has 16 part layering, so active imaginations could pair the two for special occasions. Like the weekend