There are many ways, the effects you have listed are more like just primitive real time dsp effects. stuff that is not too damaging too the sound itself. All of those can get anything down except compressor. Compressor and EQ are prob the most used and most vital to any sound and or song. Each track is probably going to get its own compression and EQ and when the song is done and ready to be mastered they usually throw another multiband compressor on it to test out the highs,mids,and lows.

To make a sound like a walkie talkie I would prob first compress an EQ where I would like it and make sure the eq has all low and most mid down. and usually add some gain or some grain to the sound which is majority of the time just clipping the sound wave to give it that hiss sound. 

Depending on your environment (for recording and manipulation) pitch changing can be an excellent way to distort sounds. Many sounds change in amazing ways when they get slowed down.

It is pretty common now for audio evnvironments to include tools for shifting pitch independent of time. Doubling up a vocal track and pitching one up or down can provide you with some really creepy vocal tracks. 

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But if you want to transpose the sound of your recording you need to make sure that the sound recorded is high quality and at a reasonable sample rate. Because things can drag out, glitch, pop, and even stutter when doing that and it will make it sound very blocky. plus if you want to change the pitch I def recommend you eq accordingly and maybe even multiband compressor with it

Another awesome effect you can do easily, is to reverse the audio clip, add reverb, and then reverse it again. It gives the audio an odd building effect.