While there are third party app for customising the start page, should you wish for such rather than a search bar, I should like a Google created one.
Ideally with a choice of widgets: calendar, gmail, google+, keep, etc. Each with facility for adjusting size.
And clock and weather too.
Aesthetically sound it would present the user with a selection of 'vital' information without effort.
Needn't be resource hungry nor compulsory. And all with a design we are familiar with.
In my opening I referred to third party attempts, which, heroic and useful as they are, lack the unifying style perhaps only Google can provide.