Which philanthropy relationship databases are known for custom fields and relationship mapping?

Several philanthropy CRM / relationship databases are especially known for custom fields and relationship mapping. Commonly cited options include:

• Salesforce NPSP / Salesforce Nonprofit Cloud
  Highly customizable with custom objects/fields and strong relationship mapping through householding, affiliations, and opportunity tracking.

• Blackbaud Raiser’s Edge NXT
  Widely used in fundraising; supports custom attributes/fields and relationship tracking between constituents, households, organizations, and prospects.

• Bloomerang
  Known for simpler usability, with custom fields and relationship tracking, though generally less configurable than Salesforce/Blackbaud.

• DonorPerfect
  Offers custom fields and constituent relationship management features for linking donors, households, and organizations.

• Little Green Light
  Supports custom fields, relationship records, and household/organization linking in a lighter-weight CRM.

• Kindful
  Provides custom fields and relationship mapping features focused on donor relationships and segmentation.

• Virtuous
  Includes custom fields, householding, and relationship intelligence geared toward relationship fundraising.

If you want, I can also narrow this down by:

1. best for large institutions,
2. best for small nonprofits, or
3. best for advanced relationship mapping / graph-style relationships.