Fear of hell is nowadays a useless method of evangelism for many reasons; one of which is that we already (here, now) live in a time of fear unprecedented since the 20th century world wars; and in important ways a fear greater than then, because unjustified; and without courage or hope of betterment.
But more deeply fear is useless; because I understand hell to be essentially self-chosen; therefore it is not feared by modern people.
So, to threaten modern people with hell is to threaten them with what they want.
This is a consequence of the extremity of modern corruption; as evident in widespread and officially sanction-implemented value inversion. This, because the cutting edge of modern 'morality' is an inversion of Christian values.
Now, hell is something desired...
Or if not actively desired, then at least regarded as preferable to Christian Heaven that excludes transgressive pleasures.
To the depraved modern sensibility; Heaven seems vulgar, sentimental and boring (especially when contrasted with the dark fascinations of the sexual euphoria promised by modernity - and with the consumerist fascinations, distractions, novelties and safe-adventures of virtual reality).
So fear is not an effective tool of Christian evangelism; on the contrary - hell is a thing wished-for, not a place of terror.
If not avoidance of the feared; what then should Christian evangelists do? What could we offer instead (honestly, truthfully)?
The answer is: alternative and superior good.
Modern Man needs to be inspired by a more-desirable actuality and prospect.
An example is Alcoholism and the sometimes-successful strategy of Alcoholics Anonymous.
To begin with, the addict wants nothing more than the drug - as much and as often as possible - a reliable supply.
It is only when the Alcoholic has had his life and happiness destroyed by the drug; and has been brought low - to the very bottom - that he will consider anything else.
And at that point (looking up 'from the depths' - de profundis); AA offers the vision of a creator God, a loving divine being, hope beyond the world; sustained by frequent and supportive fellowship (a 'church', in effect; with many meetings).
But this can happen only when alcohol is explicitly recognised and acknowledged to be the root of the problem ("I am an alcoholic"), and is repented and repudiated.
Modernity will need (typically, overall) to follow a similar trajectory; and at that point Romantic Christians needs to be ready to speak of the better hope we can offer.