Reverb can used to change the tone

In much the same way that Reverb can be used to create blend, start with a short reverb, but this time go with an unnatural-sounding reverb like a plate, spring, or nonlinear reverb. These tend to work best for single sources, just as when Reverb can be used to add sustain.¹

The reverb can then be sculpted with an EQ. Don’t be afraid to try out several different EQ plugins. The tone can also be effected by changing the pre-delay and listening for desirable comb-filtering.² The same concept can be done with short delays to add comb-filtering.³

Just adding a room reverb to the instruments can do a lot to mix things together before doing any EQ or compression.⁴