Does Revelation 7:11,12 clearly infer only God is worthy to be worshipped (not Mary, angels, nor any one else)?

Nobody worships Mary or angels or anyone else besides God if they are Christian. Perhaps you are confusing honor and veneration shown to those righteous of God as worship. ONLY God is worthy of worship, but those other heavenly hosts who have done His will or served Him rightly are at least worthy of love, respect and admiration. Just not worship. That is always reserved for God alone. I know of no Christian sects which advocate the actual worship of anyone other than God. If you are speaking of something like kissing an icon...think of it as you would a picture of your mother. If, during a tender moment of reflection on how you love your mother and in what honor and esteem you hold her, you see a picture of her, and out of love and respect, kiss the picture, that does not mean you worship your mother. It means you love her and honor her. It is the same with Mary, the Saints, Angels, etc. We love and honor them and absolutely do not worship them. That Scripture says nothing at all about any worship of anyone except God...and of course the angels worship God. They always have since their inception, and they always will.