The 18-55mm is not as bad as many people might want you make believe. Especially the newer version is quite neat. It’s not the best, nor the fastest lens and it has some quite heavy distortions on the wide end, but it’s an okay lens IMHO. I used it a lot for video. The 18-135 is (from what I heard, I never used it myself) better and also has a wider zoom-range.
The 50mm you mentioned is simply a superb lens. Nothing more to add 😉
I use the 28-135 a lot. The downside to this lens is that it’s stabilization is very loud and you will have it on the audio. But, well, DSLRs and internal audio… Not the best combination.
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“Tragedy is a close-up; comedy, a long shot.” – Buster Keaton