What ETFs to add in with VHY and IVV?

I have just started researching some ETF's. I do currently have some VGS, but may swap it with IVV (good idea?) And to of course purchase VHY and IVV soon after, considering they are two solid ETFs to have. What others may you guys suggest I'd look into? Or if someone may suggest a different ETF to subsititute one of the two (or both).

Any advice appreciated , thanks!